Our Team

Our executive and physician leaders’ 250+ years of collective experience has shaped our history — and prepared us for the future.

Practice Leadership

Yasser Ads
Senior Vice President, National Development and Integration

Yasser Ads, MD

Dr. Yasser Ads serves as senior vice president of national development and integration at Radiology Partners. In this role, he is responsible for our national sales team as well as the team that works to integrate new practice partnerships and client additions.

Previously, Dr. Ads held the role of associate partner at McKinsey & Company, a global management consulting firm, where he advised clients in the health services, public health, and medical products industries. He did his residency in urological surgery at OSU Medical Center and James Cancer Hospital in Columbus, Ohio.

Dr. Ads earned his medical degree from the University of Michigan Medical School, graduating as a Roberts Scholar. He also received a dual bachelor’s degree in biopsychology and Near Eastern studies from the University of Michigan, graduating with high distinction.

Frank Castellano, MD
Associate Chief Medical Officer, Clinical Operations, Midwest Region

Frank Castellano, MD

Dr. Frank Castellano serves as ACMO of Clinical Operations for the Midwest Region for Radiology Partners, supporting the implementation of clinical programs, IT and AI tools and managing operations for our partner practices in the Midwest.

Dr. Castellano is a diagnostic/neuroradiologist and president at Columbus Radiology in Ohio. He also serves on the RP Growth Support Board, collaborating with fellow leaders to assess practice partnership strategy and promote physician engagement.

Dr. Castellano earned his medical degree from Wright State University School of Medicine in Dayton, Ohio. He completed his residency and fellowship at the University of North Carolina, Chapel Hill.

Byron Christie, MD
Associate Chief Medical Officer, Integration

Byron Christie, MD

Dr. Byron Christie serves as ACMO of Integration and SEAL Team Practice President for Radiology Partners, supporting new site go-lives and conducting diligence processes with new site sales.

Dr. Christie is a diagnostic and interventional radiologist for Eagle RP, RP’s first partner practice formerly known as Eagle Imaging, where he was practice president. He previously served as chairman of the RP President’s Council.

Dr. Christie earned his medical degree from Baylor College of Medicine in Houston. He completed his internship in surgery at University of Texas Health Science Center in Houston and his residency at Baylor University Medical Center in Dallas.

Cameron Cleeton
Chief Development Officer

Cameron Cleeton

Cameron Cleeton serves as chief development officer for Radiology Partners.

Cameron has extensive experience successfully building healthcare businesses and teams in the United States and overseas. Previously, Cameron served as vice president of international development and operations for DaVita Inc. He also held the role of vice president of development for DaVita’s integrated care division, leading multi-specialty physician group acquisitions and hospital joint ventures.

Cameron received a bachelor's degree in international business from University of California, Berkeley, and an MBA from Duke University in Durham, North Carolina.

Basak Ertan
Chief Revenue Officer

Basak Ertan

Basak Ertan serves as chief revenue officer for Radiology Partners.

Previously, Basak held the role of vice president of revenue cycle management for DaVita, Inc., following her role as a senior associate consultant at Bain & Company, a leading strategy and management consulting firm. She has extensive experience in healthcare revenue cycle, payor strategy, marketing and public relations.

Basak received her master’s and bachelor’s degrees in mechanical engineering from Massachusetts Institute of Technology in Cambridge.

Flieschauer
Vice President, Human Resources

Ari Fleischauer

Ari Fleischauer serves as vice president of human resources for Radiology Partners.

Having cut her teeth working in the hyper dynamic labor environment of Silicon Valley, Ari was launched onto a path that has led to her having accountability for service delivery across the whole human resources landscape. Previously, she held roles at National Semiconductor, where she learned process management at a large scale. Ari then served as a senior leader for a highly successful brokerage house in San Francisco, where she decided excellent, compassionate service would be her “north star.” Eventually, she made her way to Los Angeles and held fast-paced positions in media and entertainment, learning first-hand how to handle the complexities of a high powered, diverse workforce – specifically around compensation and benefits. Combining her extensive background with her sincere belief in the value of service ultimately culminated with Ari becoming the most senior human resources leader at Radiology Partners. At Radiology Partners, Ari has become a key contributor to the M&A process, the overall plan for strategic employee development and a value key business partner in transforming radiology.

Ari received her bachelor’s degree in social psychology and business from California Polytechnic State University.

Anthony Gabriel
Chief Operating Officer

Anthony Gabriel, MD

Co-founder of Radiology Partners, Dr. Anthony Gabriel serves as chief operating officer for the Practice.

Previously, Dr. Gabriel held the role of chief operating officer for DaVita, Inc., overseeing the integration of Gambro Healthcare which doubled the size of the company. He then transitioned to the role of chief information officer, leading 1,000 teammates and 300 contractors as he oversaw a $150 million budget to develop new systems for DaVita. Dr. Gabriel also previously served as a clinical instructor at UCLA Medical Center in Los Angeles.

Dr. Gabriel received his medical degree from The Ohio State University College of Medicine in Columbus and his MBA from UCLA Anderson School of Management in Los Angeles.

Rich Heller
Associate CMO, Communications and Health Policy & National Subspecialty Lead, Pediatric Radiology

Richard Heller, MD

Dr. Richard Heller serves as ACMO of Communications and Health Policy and National Subspecialty Lead of Pediatric Radiology for Radiology Partners. He works closely with each department to collaborate on communications and strategize on policy issues to direct our advocacy efforts, in addition to leading the advancement of clinical programs for the Practice’s pediatrics subspecialty division.

Dr. Heller is a pediatric radiologist at the University of Chicago Comer Children’s Hospital. He is on the editorial board of the journal Pediatric Radiology and a leader with the Society for Pediatric Radiology and the American College of Radiology.

Dr. Heller earned his medical degree from Northwestern University Feinberg School of Medicine in Chicago and his MBA from Northwestern University Kellogg School of Management. He completed his residency at the Mallinckrodt Institute of Radiology at Washington University in St. Louis, Missouri, and his fellowship in pediatric radiology at Boston Children’s Hospital.

Dr. Glenn Kaplan
Senior Vice President, Operations

Glenn Kaplan, MD

Dr. Glenn Kaplan serves as senior vice president of operations for Radiology Partners.

As both a healthcare administration executive and board-certified physician, Dr. Kaplan has 20+ years of leadership experience in healthcare practice systems and a unique combination of business, clinical and technology expertise. Previously, he served as senior vice president and chief medical officer of radiology for the southeast group at Sheridan/Envision Healthcare, where he most recently oversaw a team of 200 radiologists covering 50 facilities within a fully-integrated radiology market, offering hospital-based, imaging center, interventional, mammography and teleradiology services. Earlier in his career, he successfully established and integrated multiple teleradiology service lines.

Dr. Kaplan received his bachelor’s degree the University of Pennsylvania and his medical degree from the University of Miami School of Medicine. He completed his diagnostic radiology residency at Mount Sinai Medical Center in Miami Beach and his body MRI fellowship at Washington University Mallinckrodt Institute in St. Louis.

Nina Kottler headshot
Associate Chief Medical Officer, Clinical Artificial Intelligence

Nina Kottler, MD

Dr. Nina Kottler serves as ACMO of Clinical Artificial Intelligence and Vice President of Clinical Operations for Radiology Partners, advancing business intelligence by identifying new technologies and piloting programs to enhance design, metrics and assessments through the deployment of AI products.

Dr. Kottler is a diagnostic radiologist for Matrix, RP's Internal Teleradiology Division. She was the first radiologist to join RP and drove the creation and implementation of recoMD, the Practice’s AI tool. Dr. Kottler also serves on multiple committees with the American College of Radiology, Radiological Society of North America, Society for Imaging Informatics in Medicine and RADxx.

Dr. Kottler earned her medical degree from University of Massachusetts Medical School in Worcester and completed her residency at University of California, San Diego.

Vikram Krishnasetty, MD
Associate Chief Medical Officer, Clinical Technology and Data

Vikram Krishnasetty, MD

Dr. Vikram Krishnasetty serves as ACMO of Clinical Technology and Data, leading initiatives for clinical applications, integrations and data management and promoting clinical reporting tools to enhance existing clinical and workflow technologies.

Dr. Krishnasetty is a body imaging and musculoskeletal radiologist and vice president at Columbus Radiology in Ohio.

Dr. Krishnasetty earned his medical degree from George Washington University in Washington, D.C. He served as chief resident and completed his fellowship in musculoskeletal radiology and abdominal imaging at Massachusetts General Hospital in Boston. With a background in software engineering and AI research, Dr. Krishnasetty also holds a bachelor’s degree in computer science.

James Lyons
Associate Chief Medical Officer, Clinical Operations, West Region

James Lyons, MD

Dr. James Lyons serves as ACMO of Clinical Operations for the West Region for Radiology Partners, supporting the implementation of clinical programs, IT and AI tools and managing operations for our partner practices in the West region.

Dr. Lyons is a vascular and interventional radiologist and chairman at Southwest Diagnostic Imaging (SDI) in Scottsdale, Arizona. He previously served as president for Radiology Partners of Phoenix, leading SDI through the transition to RP while serving as executive vice president.

Dr. Lyons earned his medical degree from University of Texas Southwestern Medical Center in Dallas. He completed his residency and fellowship at Western Pennsylvania Hospital in Pittsburgh.

Chris Mattern
Associate Chief Medical Officer, Rad Experience

Chris Mattern, MD

Dr. Chris Mattern serves as ACMO of Rad Experience for Radiology Partners, partnering with practice leaders to provide the right tools, resources and work environment to maintain the Practice's culture for radiologists.

Dr. Mattern is a neuroradiologist and practice president at Greensboro Radiology in North Carolina. He also serves as board member for DRI Imaging Centers in California.

Dr. Mattern earned his medical degree from Mayo Clinic School of Health Sciences in Rochester, Minnesota. He completed his residency in diagnostic radiology and fellowship in neurology at Wake Forest School of Medicine in Winston-Salem, North Carolina.

Charles McRae
Senior Vice President, Operations

Charles McRae

Charles McRae serves as senior vice president of operations for Radiology Partners for the Midwest, Practice Excellence and CORE.

Previously, Charles held the role of practice administrator at Vista Radiology in Knoxville, Tennessee. He has a strong background in progressive leadership experience in healthcare value, growth, strategic planning and clinical cost management.

Charles earned his MBA in finance and logistics at the Haslam College of Business at University of Tennessee, Knoxville. With a focus on data management, analysis and modeling, his passion lies in quantifying the value of radiology and radiologists in the healthcare economic model. Additionally, Charles played football at the University of Tennessee and was the seventh selection in the 1991 NFL Draft.

Krishna Nallamshetty, MD
Associate Chief Medical Officer, Clinical Value

Krishna Nallamshetty, MD

Dr. Krishna Nallamshetty serves as ACMO of Clinical Value and Executive Vice President for Radiology Partners, advancing the Practice's clinical roadmap through development of value-based clinical programs to support patient care outcomes, safety, and payer and policy initiatives. He also serves on the RP Growth Support Board to assess practice partnership strategy.

Dr. Nallamshetty is a cardiovascular radiologist and president at Radiology Associates of Florida. He serves as the Chief of Staff for Tampa General Hospital, the largest academic medical center in Florida, and is an Associate Professor of Radiology and Cardiology at the University of South Florida.

Dr. Nallamshetty earned his medical degree from Thomas Jefferson University in Philadelphia. He completed his residency in diagnostic imaging at Tufts University School of Medicine and fellowship in Cardiovascular Imaging at Harvard Medical School.

Eric Rohren
Associate Chief Medical Officer, Clinical Research and Education

Eric Rohren, MD

Dr. Eric Rohren serves as ACMO of Clinical Research and Education for Radiology Partners, leading the Radiology Partners Research Institute, partnering with academic centers to publish research and overseeing the Practice’s Education Committee.

Dr. Rohren also serves as chairman for the department of radiology at Baylor College of Medicine in Houston. Previously, he held the role of chief of positron emission tomography at MD Anderson Cancer Center.

Dr. Rohren earned his medical degree from Mayo Medical School in Rochester, Minnesota. He completed his diagnostic imaging residency and nuclear medicine fellowship at Duke University in Durham, North Carolina. He also holds a Ph.D. in immunology from Mayo Graduate School.

Arthy Saravanan, MD
Associate Chief Medical Officer, Recruitment

Arthy Saravanan, MD

Dr. Arthy Saravanan serves as ACMO of Recruitment for Radiology Partners, supporting the development of national recruiting strategy and collaborating with the marketing team to elevate the Practice's brand.

Dr. Saravanan is a breast imaging radiologist and serves as chair of marketing at ARA Diagnostic Imaging in Austin, Texas. She is also an assistant professor for the department of diagnostic medicine at Dell Seton Medical Center at the University of Texas in Austin.

Dr. Saravanan earned her medical degree from Indiana University School of Medicine in Indianapolis. She completed her residency at Providence Hospital in Southfield, Michigan, and Aultman/Mercy Hospital/NEOMED in Canton, Ohio. She completed her fellowship in breast imaging at University Health Network in Toronto.

rp-_0016_IMG_3694
Chief Legal Officer

Joseph Schohl

Joseph ("Joe") Schohl serves as chief legal officer for Radiology Partners and has worked with RP since 2013.

Previously, Joe founded and led GeneralCounselWest, PC, a boutique law firm serving emerging and established healthcare entities. Before that, Joe held the role of general counsel and secretary for DaVita Inc., leading the law department to be recognized by Inside Counsel magazine as one of the 10 most innovative legal departments in the country. He has decades of experience providing legal counsel to healthcare companies, including his roles as corporate counsel at Baxter Healthcare, senior associate at Sidley Austin LLP and associate at Milbank, Tweed, Hadley & McCloy LLP.

Joe received his law degree from Columbia University School of Law in New York, MBA from Northwestern University Kellogg School of Management in Chicago and bachelor's degree in finance from University of Illinois in Champaign.

Rajeev Shah
Associate Chief Medical Officer, Clinical Operations, Texas, New Mexico and Oklahoma

Rajeev Shah, MD

Dr. Rajeev Shah serves as ACMO of Clinical Operations for Texas, New Mexico and Oklahoma of Radiology Partners, supporting the implementation of clinical programs, IT and AI tools and manages operations for partner practices in the region.

Dr. Shah is a neuroradiologist at ARA Diagnostic Imaging in Austin, Texas. He also serves as the Second Vice President on the Board of the Texas Radiology Society Foundation and Alternate Councilor of the American College of Radiology (ACR). Recently, he has served as the treasurer for ARA, Texas Radiology Society and Texas Radiology Society Foundation and as Councilor to the ACR.

Dr. Shah earned his medical degree from University of Texas Medical Branch at Galveston and his MBA from University of Texas at Austin. He completed his residency in diagnostic radiology at University of Texas Medical Branch at Galveston and his fellowship in neuroradiology at Baylor College of Medicine in Houston.

Gavin Slethaug
Associate Chief Medical Officer, Growth

Gavin Slethaug, MD

Dr. Gavin Slethaug serves as ACMO of Growth and executive vice president of practice partnerships for Radiology Partners, leading and supporting all initiatives of the Practice's growth team, including partnerships and M&A, internal market development and national health system relationships.

Dr. Slethaug is an interventional radiologist at Southwest Medical Imaging (SMIL) and HonorHealth, in Scottsdale, Arizona. He is a partner at SMIL and has held numerous leadership positions within SMIL, HonorHealth and Southwest Diagnostic Imaging. Currently, he serves on the board of AZPACT (Arizona Physicians Advancing Cardiovascular Treatment) and also on the leadership council for HonorHealth's Heart and Vascular Institute.

Dr. Slethaug earned his medical degree from University of Toronto. He completed both his residency and fellowship in interventional radiology at Mallinckrodt Institute of Radiology at Washington University Medical Center in St. Louis, Missouri.

Steve Tumbarello
Chief Financial Officer

Steve Tumbarello

Steve Tumbarello has served as Radiology Partners chief financial officer since 2014.

Previously, Steve was vice president of finance for Smile Brands Inc., a leading dental practice management company, leading the corporate and operational finance team and providing M&A support as the company grew from $75 million to more than $500 million in annualized revenues. Additionally, Steve held progressive finance and operating roles for Vivra, Inc., a leading dialysis services company. He has more than 25 years of extensive financial, leadership and operational experience in healthcare services.

Steve received a bachelor's degree in business administration with a focus in accounting from California State University, Fullerton, and is an inactive CPA in the state of California.

Vijay Vaidya
Senior Vice President, Operations and Corporate Strategy

Vijay Vaidya, MD

Dr. Vijay Vaidya serves as senior vice president of operations and corporate strategy for Radiology Partners.

Dr. Vaidya is also a practicing cardiologist at Harbor-UCLA Medical Center in Los Angeles and a faculty member at the UCLA School of Medicine. Previously, he held the role of associate partner in the healthcare practice at McKinsey & Company, leading engagements across commercial strategy, provider and payor operations, digital and technology, and research and development.

Dr. Vaidya earned his joint medical degree and MBA from Tufts University in Boston. He completed his fellowship in cardiovascular medicine at Harbor-UCLA Medical Center and his residency in internal medicine at Ronald Reagan UCLA Medical Center. He also holds a bachelor’s degree in biomedical engineering from Northwestern University in Chicago.

Rich Whitney
Chairman and Chief Executive Officer

Rich Whitney

Co-founder of Radiology Partners, Rich Whitney serves as chairman and CEO of the Practice, in addition to serving as a venture partner and advisor to New Enterprise Associates.

Previously, Rich served as CFO of DaVita Inc., where he helped lead the turnaround of the company, creating more than $3 billion of equity value over three years. He was also integral to DaVita’s growth over many years, leading the acquisition of Gambro Healthcare from Gambro AB and the acquisition of Healthcare Partners, one of the nation's largest physician practices providing integrated and capitated care to more than 1.5 million patients (now part of Optum).

Rich received his bachelor's degree in business administration from Pennsylvania State University in University Park and his MBA from Harvard Business School in Cambridge, Massachusetts. He has a long track record of leading, founding and investing in healthcare organizations that create meaningful change in their specialties, serving as an investor, director and chairman of a variety of healthcare companies for more than 15 years. Rich currently serves on the board and is an investor in CHG Healthcare Services, Strive Health and National Veterinary Associates.

syed zaiti
Associate Chief Medical Officer, Integration

Syed Zaidi, MD

Dr. Syed F. Zaidi serves as ACMO of Integration for Radiology Partners, supporting the Practice’s new site go-lives with being one of the key leaders for the SEAL practice and conducting diligence processes with new site sales. He also holds the roles of Chair of Population Health for the American College of Radiology and board member of RADPAC, the national radiology political action committee.

Previously, Dr. Zaidi served in multiple leadership roles, including Vice President of Clinical Operations and Growth for RP, Founder/CEO of RadHelp and President/CEO of Radiology Associates of Canton in Ohio.

Dr. Zaidi earned his medical degree from New York University and his MBA from Wharton/University of Pennsylvania in Philadelphia. He completed his residency in diagnostic radiology at Beth Israel Medical Center in New York and his fellowships in vascular and interventional radiology at Yale University in New Haven, Connecticut. He and his wife Mehdia along with their daughter Maira make their home in Washington, DC.

Denis Zerr
Chief Information Officer

Denis Zerr

Denis Zerr serves as chief information officer for Radiology Partners.

Previously, Denis held the role of chief information officer and senior vice president for Catholic Health Initiatives and served as vice president of information and business services for Amgen, the world’s largest biotechnology company. He has a strong track record of developing and leading IT programs in healthcare and life sciences organizations.

Denis earned a master’s degree in information systems from Telecom Ecole de Management in Paris and an additional master’s degree in business and management from Universite Paris Dauphine.

Subspecialty Leadership

Vivek Bansal
National Subspecialty Lead, Neuroradiology

Vivek Bansal, MD, PhD

Dr. Vivek Bansal serves as National Subspecialty Lead of Neuroradiology for Radiology Partners.

Dr. Bansal is a board member and the section chief of neuroradiology at RP Gulf Coast in Houston, Texas. Additionally, he serves as the lead radiologist for HCA Gulf Coast Division’s Neuroscience Governance Council, a Clinical Assistant Professor at University of Houston College of Medicine and industry consultant for companies performing stroke data analytics and advanced neuroradiology image processing.

Dr. Bansal completed his medical degree and residency at Baylor College of Medicine in Houston and his fellowship in neuroradiology at Emory University in Atlanta. He also completed a Ph.D. in bioengineering, working on devices for functional neuroimaging, at Rice University in Houston.

Dana Bonaminio, MD
National Subspecialty Lead, Women's Imaging

Dana Bonaminio, MD

Dr. Dana Bonaminio serves as National Subspecialty Lead of Women’s Imaging for Radiology Partners.

Dr. Bonaminio is a breast imaging radiologist at Advanced Diagnostic Imaging. She also serves as director of breast imaging for Ascension Saint Thomas Midtown in Nashville, Tennessee. She is a board member for Tennessee Women in Medicine, and she is an active member of Society for Breast Imaging, Tennessee Radiological Society and American Association for Women Radiologists.

Dr. Bonaminio earned her medical degree from University of Cincinnati College of Medicine in Ohio. She completed her radiology residency and breast imaging fellowship at Indiana University in Indianapolis.

Daniel Brunengraber
National Subspecialty Lead, Cardiothoracic Imaging

Daniel Brunengraber, MD

Dr. Daniel Brunengraber serves as National Subspecialty Lead of Cardiothoracic Imaging for Radiology Partners.

Dr. Brunengraber is a vascular and neuroradiologist for Renaissance Imaging Medical Associates (RIMA), which serves hospitals and outpatient centers across southern California. He is also on the Structural Heart Disease Preoperative Planning Committee for RIMA’s local client hospitals and develops programs for peer learning.

Dr. Brunengraber earned his medical degree from Case Western University School of Medicine in Cleveland, Ohio. He completed a fellowship in cardiovascular imaging from University of California, Los Angeles, and a fellowship in neuroradiology at Cleveland Clinic.

Thomas Farquhar
National Subspecialty Lead, Body Imaging

Thomas Farquhar, MD, PhD

Dr. Thomas Farquhar serves as National Subspecialty Lead of Body Imaging for Radiology Partners.

Dr. Farquhar is a diagnostic radiologist and partner at Jefferson Radiology in Hartford, Connecticut. He is also a core faculty member for the Hartford Hospital Diagnostic Radiology Residency Program, having twice been honored as “Teacher of the Year,” in addition to serving as Vice President and Councilor for the Connecticut chapter of the American College of Radiology (ACR). In 2021, he was named a Fellow of the ACR (FACR). He previously served as chief of radiology at Mills-Peninsula Health Services in Burlingame, California, and Hartford Hospital in Hartford, Connecticut. Dr. Farquhar published several scholarly articles pertaining to his research in whole-body positron emission tomography.

Dr. Farquhar earned his doctorate in biomedical physics and medical degree from the UCLA School of Medicine in Los Angeles. He completed his residency at the University of California, San Francisco and his fellowship in MRI at UCSD Medical Center in San Diego.

Rich Heller
Associate CMO, Communications and Health Policy & National Subspecialty Lead, Pediatric Radiology

Richard Heller, MD

Dr. Richard Heller serves as ACMO of Communications and Health Policy and National Subspecialty Lead of Pediatric Radiology for Radiology Partners. He works closely with each department to collaborate on communications and strategize on policy issues to direct our advocacy efforts, in addition to leading the advancement of clinical programs for the Practice’s pediatrics subspecialty division.

Dr. Heller is a pediatric radiologist at the University of Chicago Comer Children’s Hospital. Additionally, he is an officer of the Society for Pediatric Radiology, an editorial board member of Pediatric Radiology Journal and a leader of economic-focused committees for the American College of Radiology.

Dr. Heller earned his medical degree from Northwestern University Feinberg School of Medicine in Chicago and his MBA from Northwestern University Kellogg School of Management. He completed his residency at the Mallinckrodt Institute of Radiology at Washington University in St. Louis, Missouri, and his fellowship in pediatric radiology at Boston Children’s Hospital.

Hetal Patel, MD
National Subspecialty Lead, Musculoskeletal Radiology

Hetal Patel, MD

Dr. Hetal Patel serves as National Subspecialty Lead of Musculoskeletal Radiology for Radiology Partners, where he is also active on the RP Regional Growth Team, Hospital System Support Board and Practice Excellence Support Board.

Dr. Patel is a musculoskeletal radiologist and chief of musculoskeletal care at Greensboro Radiology in Greensboro, North Carolina. He also serves on the medical executive committee for Cone Health-Alamance Regional Medical Center in Burlington, North Carolina.

Dr. Patel earned his medical degree from Eastern Virginia Medical School in Norfolk. He completed his diagnostic radiology residency at Baystate Medical Center/Tufts University in Springfield, Massachusetts, and his musculoskeletal radiology fellowship at Duke University in Durham, North Carolina.

Constantino Pena, MD
National Subspecialty Lead, Interventional Radiology

Constantino Peña, MD

Dr. Constantino Peña serves as National Subspecialty Lead of Interventional Radiology for Radiology Partners.

Dr. Pena is an interventional radiologist and medical director of vascular imaging at Miami Cardiac and Vascular Institute. He also serves as chairman of Miami Cardiac and Vascular Institute Management Company and sits on the annual meeting committee for the Society of Interventional Radiology.

Dr. Pena earned his medical degree from Yale University School of Medicine in New Haven, Connecticut. He completed his diagnostic radiology residency and vascular interventional fellowship at Massachusetts General Hospital in Boston.

Sabeen Rahman, MD
National Subspecialty Lead, Nuclear Medicine

Saiyyeda Rahman, MD

Dr. Saiyyeda ("Sabeen") Rahman serves as National Subspecialty Lead of Nuclear Medicine for Radiology Partners.

Dr. Rahman is a nuclear radiologist and director of nuclear medicine and PET/CT for RP Houston. She also serves as an oncology liaison to a member health system and is part of the Radiology and Oncology Committee and Medical Equipment Advisory Committee for member hospitals.

Dr. Rahman earned her medical degree from Baqai Medical College in Pakistan. She completed a residency in nuclear medicine at Baylor College of Medicine in Houston and a second residency in diagnostic radiology at the Medical University of South Carolina in Charleston.

Board of Directors

Radiology Partners is financially backed by two institutional investors, New Enterprise Associates (NEA) and  Starr Investment Holdings (SIH).

Joel Allison
Director

Joel Allison

Joel Allison is a distinguished leader in healthcare, hospital management and value-based care, currently serving as Senior Advisor to the Robbins Institute for Health Policy and Leadership at Baylor University School of Business.

Previously, Joel served as long-time president and CEO of Baylor Scott & White Health, one of the nation's largest not-for-profit health systems. He joined the health system in 1993 as chief operating officer and was elevated to CEO in 2000, during which he helped lead the merger between Baylor Health Care System and Scott & White Healthcare. He most recently served as chairman of the Board of Regents at Baylor University in Waco, Texas.

Joel received his master’s degree in healthcare administration/management from Trinity University in San Antonio and completed the Advanced Management Program at Harvard University in Cambridge, Massachusetts. He is a fellow of the American College of Healthcare Executives and earned the Award of Honor from the American Hospital Association.

William Brody, MD
Director

William Brody, MD

Dr. William Brody is a radiologist by background, and he currently serves on the Board of Trustees for Curtis Institute of Music and Stanford Health Care.

Previously, Dr. Brody held the role of president of Salk Institute for Biological Sciences following his tenure as president of John Hopkins University in Baltimore. A co-founder of three medical device companies, he is a member of the National Academy of Engineering and the National Academy of Medicine. Dr. Brody has also served as a board member for seven public med-tech companies and 12 private companies, most recently as the Chair of Mesa Biotech (acquired by Thermo Fisher Scientific in 2021).

Dr. Brody received his bachelor’s and master’s degrees in electrical engineering and computer science from the Massachusetts Institute of Technology in Cambridge, and he earned a doctorate in electrical engineering and a medical degree from Stanford University. Dr. Brody completed his training in cardiovascular surgery and radiology at Stanford University, the National Institutes of Health and the University of California, San Francisco. He has authored more than 100 articles in U.S. medical journals and holds two U.S. patents in medical imaging.

Geoffrey Clark
Director

Geoffrey Clark

Geoffrey Clark serves as senior managing director of Starr Investment Holdings, a multi-billion-dollar Nashville and New York-based private equity manager that invests in technology-enabled healthcare companies, as well as related business services platforms.

Previously, Geoffrey spent over a decade at Goldman, Sachs & Co. in New York, where he was a partner and managing director.

Geoffrey graduated as a Leslie Wong Fellow with a bachelor’s degree in finance from University of British Columbia. He is a Chartered Financial Analyst.

Gregory Connor, MD
Director

Gregory Connor, MD

Dr. Gregory Connor is a practicing radiologist and currently serves as president of ARA Diagnostic Imaging in Austin, in addition his role as chief of radiology at University of Texas Dell Medical School.

Previously, Dr. Connor held various leadership roles at Texas Radiological Society, including chief counselor, treasurer and chair of the Legislative Committee, in addition to serving as a board member of Strategic Radiology.

Dr. Connor earned his medical degree from the Medical University of South Carolina in Charleston. He served as chief resident at John Hopkins Hospital in Baltimore and competed his fellowship in musculoskeletal radiology at Duke University in Durham, North Carolina.

Jeffrey Immelt
Director

Jeffrey Immelt

Jeffrey (Jeff) Immelt joined New Enterprise Associates in 2018 as a Venture Partner on both the technology and healthcare investing teams. He is the author of HOT SEAT, a memoir of leadership in times of crisis.

Jeff served as chairman and CEO of GE for 16 years, where he revamped the company’s strategy, global footprint, workforce and culture. During his tenure, he led several innovative transformations that doubled industrial earnings, reshaped the portfolio, re-established market leadership, grew a strong share position in essential industries and quadrupled emerging market revenue.

Jeff has been named one of the “World’s Best CEOs” three times by Barron’s. While serving as CEO, GE was named “America’s Most Admired Company” by Fortune magazine and one of “The World’s Most Respected Companies” in polls by Barron’s and the Financial Times. He has received 15 honorary degrees and numerous awards for business leadership, in addition to chairing the President’s Council on Jobs and Competitiveness under the Obama administration.

Jeff earned a bachelor’s degree in applied mathematics from Dartmouth College and an MBA from Harvard University. He currently serves on the board for NEA portfolio companies Bloom Energy, Bright Health, Cleo, Collective Health, Desktop Metal, Formlabs, Tri Alpha Energy and Tuya. Jeff is also on the board of Sila Nanotechnologies and Twilio, a public company leader in mobile communication, and is a member of The American Academy of Arts & Sciences. He and his wife have one daughter.

Mohamad Makhzoumi
Director

Mohamad Makhzoumi

Mohamad Makhzoumi is a general partner and head of New Enterprise Associates (NEA)’s Global Healthcare Investing practice, which typically accounts for $1.5 billion of investments every two to three years across healthcare services, healthcare IT, biopharma and medical devices. Mohamad’s personal investment practice is primarily focused on the healthcare services and healthcare information technology sectors where he is currently a Director of Aetion, Bright Health, Collective Health, Comprehensive Pharmacy Services, Nuvolo, Paladina Health, Radiology Partners, Strive Health and Welltok. Mohamad’s past investments include Bravo Health, CHG Healthcare, DaVita NephroLife, DSI Renal, Golden State Medical Supply, Long Term Care Group, ppoNEXT, U.S. Renal Care and Vantage Oncology.

Previously, Mohamad focused on growth equity investments at Summit Partners prior to which he worked with UBS Investment Bank, concentrating on leveraged finance and sponsor-led transactions. Mohamad received a bachelor's degree with distinction from the University of Pennsylvania in Philadelphia and is a Board Member of the National Venture Capital Association (NVCA).

Joseph Mello
Director

Joseph Mello

Joe Mello is a private investor and management consultant in the healthcare industry. He is currently a member of the board of Everside Health, Project Connect and MARS Petcare. He also serves on the advisory board to the President of the Georgia Institute of Technology in Atlanta and various other non-profit organizations.

Previously, Joe held the roles of president at DaVita Medical Group and chief operating officer of DaVita Inc. Prior to his time at DaVita, he served as an executive leader and board member for a variety of privately held and public healthcare companies, in addition to his role as a partner in the healthcare consulting group at KPMG.

Joe received a bachelor’s degree in industrial engineering from the Georgia Institute of Technology in Atlanta and an MBA in finance from Golden Gate University in San Francisco.

Rod Owen, MD, FACR
Director

Rod Owen, MD

Dr. Rod Owen is a practicing radiologist and board chair at Scottsdale Medical Imaging in Arizona. He also serves as department chair of radiology at HonorHealth and chair of operations and finance at Innovation Care Partners, an affiliate of HonorHealth.

Previously, Dr. Owen held the role of medical director of radiology and served on the Quality Resources Management Committee for Scottsdale Healthcare System. He is a founding member and former vice chairman of Strategic Radiology.

Dr. Owen earned his medical degree from Johns Hopkins School of Medicine in Baltimore. He completed his residency in radiology and his fellowship in diagnostic radiology at University of Pennsylvania in Philadelphia. He is a fellow of the American College of Radiology and served as president of the Arizona chapter.

Kavita Patel, MD, MS, FACP
Director

Kavita Patel, MD

Dr. Kavita Patel is a Nonresident Fellow at the Brookings Institution and a primary care physician in Washington, DC. She also serves as an advisor to the Bipartisan Policy Center and a member of Health and Human Services Physician Focused Payment Model Technical Advisory Committee.

Previously, Dr. Patel was managing director of clinical transformation at the Center for Health Policy at Brookings. She also served in the Obama Administration as director of policy for the Office of Intergovernmental Affairs and Public Engagement. As senior aide to Valerie Jarrett, President Obama’s senior advisor, Dr. Patel played a critical role in policy development and evaluation of policy initiatives connected to health reform, financial regulatory reform and economic recovery issues. Dr. Patel also has a deep understanding of Capitol Hill from her time spent on late Senator Edward Kennedy’s staff as deputy staff director on health. She served as a policy analyst and trusted aide to the Senator and was part of the senior staff of the Health, Education, Labor and Pensions (HELP) Committee. Dr. Patel also has an extensive research and clinical background, having worked as a researcher at RAND Corporation and as a practicing physician in both California and Oregon. She currently advises health care technology and services organizations through New Enterprise Associates.

Dr. Patel is a previous Robert Wood Johnson Clinical Scholar. She earned her medical degree from the University of Texas Health Science Center in Houston and her master’s degree in public health from the University of California in Los Angeles.

Robert Sheehy
Director

Robert Sheehy

Robert ("Bob") Sheehy serves as co-founder and executive board chairman of Bright Health, a consumer-driven health insurance company, following his five-year tenure as CEO.

Previously, Bob held the roles of CEO and chief operating officer of UnitedHealthcare during his 20-year tenure at UnitedHealth Group, Inc. He led the group through its transformation from a regional to a national payor.

Bob earned his bachelor’s and master’s degrees from the University of Michigan in Ann Arbor. He is a nationally recognized expert on healthcare innovation, marketplace consolidation and payment models.

Rich Whitney
Chairman

Rich Whitney

Co-founder of Radiology Partners, Rich Whitney serves as chairman and CEO of the Practice, in addition to serving as a venture partner and advisor to New Enterprise Associates.

Previously, Rich served as CFO of DaVita Inc., where he helped lead the turnaround of the company, creating more than $3 billion of equity value over three years. He was also integral to DaVita’s growth over many years, leading the acquisition of Gambro Healthcare from Gambro AB and the acquisition of Healthcare Partners, one of the nation's largest physician practices providing integrated and capitated care to more than 1.5 million patients (now part of Optum).

Rich received his bachelor's degree in business administration from Pennsylvania State University in University Park and his MBA from Harvard Business School in Cambridge, Massachusetts. He has a long track record of leading, founding and investing in healthcare organizations that create meaningful change in their specialties, serving as an investor, director and chairman of a variety of healthcare companies for more than 15 years. Rich currently serves on the board and is an investor in CHG Healthcare Services, Strive Health and National Veterinary Associates.