Clinicians affiliated with Massachusetts General Hospital

Acute Care Hospitals · Voluntary non-profit - Private · 55 Fruit Street, Boston, MA 02114 · Boston-Cambridge-Newton, MA-NH · CCN 220071

Affiliation snapshotNovember 2, 2026CMS Doctors and Clinicians Facility Affiliation file, current snapshot (no end-of-2024 archive), applied to 2024

Activity year2024Medicare Part B claims, Original Medicare fee-for-service

4,980 clinicians affiliated with Massachusetts General Hospital are in the 2024 Medicare Part B data (5,727 listed in the affiliation file).

Each clinician's exact figures are in their Physician Report, from their page. View sample report · Already purchased? Open your report (earlier Local report and passes)

Affiliated clinicians by specialty, 2024

All specialties · Internal Medicine (785) · Nurse Practitioner (618) · Physician Assistant (330) · Diagnostic Radiology (313) · Neurology (191) · Cardiology (184) · Anesthesiology (182) · Family Practice (157) · Pathology (149) · Hospitalist (144) · Hematology-Oncology (116) · Gastroenterology (103) · Psychiatry (103) · Endocrinology (98) · Medical Oncology (89) · Certified Registered Nurse Anesthetist (CRNA) (88) · Emergency Medicine (88) · Orthopedic Surgery (87) · Ophthalmology (86) · Pulmonary Disease (77) · Infectious Disease (75) · Nephrology (65) · Obstetrics & Gynecology (62) · General Surgery (61) · Otolaryngology (59) · Physical Medicine and Rehabilitation (58) · Urology (54) · Rheumatology (51) · Dermatology (50) · Radiation Oncology (48) · Critical Care (Intensivists) (29) · Neurosurgery (29) · Psychologist, Clinical (28) · Hospice and Palliative Care (26) · Allergy/ Immunology (24) · Thoracic Surgery (24) · Clinical Cardiac Electrophysiology (22) · Hematology (21) · Surgical Oncology (16) · Vascular Surgery (16) · Pediatric Medicine (15) · Advanced Heart Failure and Transplant Cardiology (14) · Interventional Cardiology (13) · Podiatry (13) · Geriatric Medicine (12) · Hand Surgery (12) · Oral Surgery (Dentist only) (12) · Interventional Radiology (10) · Plastic and Reconstructive Surgery (10) · Sports Medicine (9) · Optometry (7) · Cardiac Surgery (6) · Gynecological Oncology (6) · Pain Management (6) · Adult Congenital Heart Disease (5) · Colorectal Surgery (Proctology) (5) · Nuclear Medicine (5) · Addiction Medicine (3) · Audiologist (3) · Certified Clinical Nurse Specialist (2) · Dentist (2) · General Practice (1) · Interventional Pain Management (1) · Maxillofacial Surgery (1) · Preventive Medicine (1)

Dermatology affiliated with Massachusetts General Hospital, 2024

Alphabetical by last name; 50.

Name	City
Maria Beatrice T Alora, MD	Boston, MA
Tiffany A Angel, MD	Houston, TX
Lynn A Baden, M.D.	Newton, MA
Omar Badri, M.D.	Beverly, MA
Steven T Chen, M.D., M.P.H.	Boston, MA
Shinjita Das, MD	Dallas, TX
Marcela G Delcarmen, MD	Boston, MA
Shadmehr (Shawn) Demehri, MD, PHD	Boston, MA
Madeline E Dewane, MD	Boston, MA
Erika L Elliott, MD	Boston, MA
Flavia Fedeles, M.D.	Wellesley, MA
Jessica L Fewkes, M.D.	Boston, MA
Esther E Freeman, M.D., PH.D	Boston, MA
Sameer G Gupta, M.D.	Boston, MA
Elena B Hawryluk, M.D., PH.D.	Boston, MA
Sotonye Imadojemu, M.D., M.B.E.	Boston, MA
Joseph C Kvedar, MD	Boston, MA
Yakir Levin, MD, PHD	Boston, MA
David G Li, MD, MBA	Boston, MA
Evelyn Lilly, M.D.	Boston, MA
William M Lin, MD	Boston, MA
Mayra E Lorenzo, M.D., PH.D.	Boston, MA
Bonnie T Mackool, MD	Boston, MA
Alexander Marneros	New York, NY
Rachel Meltzer, MD	Boston, MA
David M Miller, M.D., PH.D.	Boston, MA
Jessica S Mosher, MD	Wellesley Hills, MA
Victor A Neel, MD PHD	Boston, MA
Gregory M Orlowski, MD, PHD	Newton, MA
Stephen M Ostrowski	Cleveland, OH
Ellen K Roh, MD	Boston, MA
Emily S Ruiz, MD	Boston, MA
Yevgeniy R Semenov, MD, MA	Boston, MA
Julia A Siegel, MD	Boston, MA
Arthur J Sober, MD	Boston, MA
Robert Staszewski, M.D.	Boston, MA
Michael Stephens	Boston, MA
Charles R Taylor, MD	Boston, MA
Nicholas Theodosakis, MD, PHD	Boston, MA
Janice Tiao, M.D.	Boston, MA
John Christopher L Trinidad, M.D., M.P.H	Boston, MA
Hensin Tsao, M.D.	Boston, MA
Sandy S Tsao, MD	Boston, MA
Frank R Vleugels, MD	Boston, MA
Ruth Ann Vleugels, MD	Boston, MA
Abigail H Waldman, MD	Boston, MA
Andrew C Walls, MD	Boston, MA
Ramone F Williams, MD, MPHIL	Boston, MA
Deon Wolpowitz, MD	Wellesley Hills, MA
Fan Di Xia	Boston, MA

Affiliation comes from the CMS Doctors and Clinicians Facility Affiliation file, hospital rows only; name, address and type from the CMS Hospital General Information file. CMS does not publish an end-of-year archive of the affiliation file, so the current snapshot is applied to the latest data year. A clinician listed with several hospitals or groups appears on each of their pages. How hospital pages are built