Clinicians affiliated with Massachusetts General Physicians Organization Inc
3,558 clinicians on file with this group · most practice in Boston-Cambridge-Newton, MA-NH · PAC ID 2466365820
2,771 clinicians affiliated with Massachusetts General Physicians Organization Inc are in the 2024 Medicare Part B data, 2,106 of them physicians. Data years with affiliated clinicians: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024.
Each clinician's exact figures are in their Physician Report, from their page; a specialty's figures in this market are in a Market Comparison. View sample report · Already purchased? Open your report
Affiliated clinicians by specialty, 2024
All specialties · Nurse Practitioner (331) · Internal Medicine (250) · Diagnostic Radiology (166) · Physician Assistant (166) · Anesthesiology (149) · Neurology (141) · Certified Registered Nurse Anesthetist (CRNA) (101) · Cardiology (96) · Psychiatry (90) · Pathology (85) · Hematology-Oncology (81) · Emergency Medicine (79) · Hospitalist (76) · Physical Medicine and Rehabilitation (72) · Gastroenterology (71) · Endocrinology (57) · Infectious Disease (56) · General Surgery (52) · Medical Oncology (46) · Dermatology (43) · Psychologist, Clinical (42) · Nephrology (41) · Pulmonary Disease (41) · Orthopedic Surgery (39) · Obstetrics & Gynecology (38) · Radiation Oncology (36) · Critical Care (Intensivists) (24) · Hospice and Palliative Care (23) · Rheumatology (23) · Neurosurgery (22) · Urology (21) · Allergy/ Immunology (18) · Family Practice (17) · Clinical Cardiac Electrophysiology (16) · Thoracic Surgery (16) · Vascular Surgery (13) · Surgical Oncology (12) · Oral Surgery (Dentist only) (10) · Plastic and Reconstructive Surgery (10) · Advanced Heart Failure and Transplant Cardiology (9) · Geriatric Medicine (8) · Hematology (8) · Pediatric Medicine (8) · Interventional Cardiology (7) · Sports Medicine (7) · Adult Congenital Heart Disease (5) · Cardiac Surgery (5) · Pain Management (5) · Colorectal Surgery (Proctology) (4) · Licensed Clinical Social Worker (4) · Otolaryngology (4) · Podiatry (4) · Addiction Medicine (3) · Gynecological Oncology (3) · Hand Surgery (3) · Interventional Radiology (3) · Registered Dietitian or Nutrition Professional (3) · Certified Clinical Nurse Specialist (2) · Certified Nurse Midwife (1) · Interventional Pain Management (1) · Licensed Professional Counselor (1) · Maxillofacial Surgery (1) · Ophthalmology (1) · Preventive Medicine (1)
Specialty links go to the specialty in Boston-Cambridge-Newton, MA-NH.
Clinicians affiliated with Massachusetts General Physicians Organization Inc, 2024
Alphabetical by last name; 2,601–2,700 of 2,771.
| Name | Specialty | City |
|---|---|---|
| Lisa Warren, MD | Anesthesiology | Boston, MA |
| Gregory Waryasz, M.D. | Orthopedic Surgery | Providence, RI |
| Jason H Wasfy, M.D. | Cardiology | Boston, MA |
| Meagan M Wasfy, MD | Cardiology | Boston, MA |
| Nathan Wass, M.D. | Internal Medicine | Boston, MA |
| Amanda N Watt, PA-C | Physician Assistant | Boston, MA |
| Robert D Weatherford, MD | Obstetrics & Gynecology | Boston, MA |
| Theodore C Weatherwax, MD | Family Practice | Boston, MA |
| Emma Webb | Physician Assistant | Boston, MA |
| Julia M Webb, M.D. | Physical Medicine and Rehabilitation | Boston, MA |
| Colin D Weekes, M.D. | Medical Oncology | Baltimore, MD |
| Eric P Wehrenberg-Klee, M.D. | Diagnostic Radiology | Boston, MA |
| Edward N Wei, M.D. | Physical Medicine and Rehabilitation | Boston, MA |
| Nancy Wei, M.D. | Endocrinology | Boston, MA |
| Michelle L Weil, M.D. | Endocrinology | Boston, MA |
| Marc N Wein, MD, PHD | Endocrinology | Boston, MA |
| Rory B Weiner, M.D. | Cardiology | Boston, MA |
| Mark S Weinfeld, MD | Cardiology | Boston, MA |
| Sandra B Weinreb, MD | Anesthesiology | Boston, MA |
| Milena Weinstein, M.D. | Obstetrics & Gynecology | Boston, MA |
| Ralph Weissleder, MD PHD | Diagnostic Radiology | Boston, MA |
| James I Weitzman, M.D. | Hematology-Oncology | Boston, MA |
| Megan J Welch, M.D. | Cardiology | Boston, MA |
| Melvin Welinsky, M.D. | Internal Medicine | Boston, MA |
| Brian A Wells, M.D. | Diagnostic Radiology | Boston, MA |
| Laura Welsh, M.D. | Emergency Medicine | Seattle, WA |
| Donghai Wen, MD | Internal Medicine | Boston, MA |
| Jenny X Wen, MD MPH | Internal Medicine | Boston, MA |
| Patrick Y Wen, MD | Neurology | Boston, MA |
| Qing Yu Weng, M.D. | Dermatology | Cambridge, MA |
| Hannah C Wenger, M.D. | Internal Medicine | Hershey, PA |
| Heidi K Wennemer, D.O. | Physical Medicine and Rehabilitation | East Sandwich, MA |
| Caroline Wessels | Certified Registered Nurse Anesthetist (CRNA) | Boston, MA |
| Peter Westervelt, MD | Medical Oncology | Brunswick, ME |
| Catharine B Wetzel, NP | Nurse Practitioner | Boston, MA |
| Deborah J Wexler, MD | Internal Medicine | Boston, MA |
| Stephanie Weygand | Certified Registered Nurse Anesthetist (CRNA) | Concord, MA |
| Elizabeth A Weyman, DNP | Nurse Practitioner | Boston, MA |
| Laura Whalen, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Boston, MA |
| Kristin C Wharton, AGPCNP-BC | Nurse Practitioner | Boston, MA |
| Benjamin A White, MD | Emergency Medicine | Boston, MA |
| Korey J White, PHYSICIAN ASSISTANT | Physician Assistant | Boston, MA |
| Rodger M White, MD | Anesthesiology | Boston, MA |
| Gabrielle A White-Dzuro, MD | Anesthesiology | Boston, MA |
| David C Whitehead | Emergency Medicine | Boston, MA |
| Christopher Wight, LICSW | Licensed Clinical Social Worker | Boston, MA |
| Alexandra N Willauer, MD | Hospitalist | Boston, MA |
| Henning Willers, MD | Radiation Oncology | Boston, MA |
| Ryan Willett | Diagnostic Radiology | San Antonio, TX |
| Pamela W Williams, RNP | Nurse Practitioner | Boston, MA |
| Patricia A Williams, APRN, AGNP | Nurse Practitioner | Boston, MA |
| Ramone F Williams, MD, MPHIL | Dermatology | Boston, MA |
| Shauna Williams, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Boston, MA |
| Winfred W Williams, MD | Nephrology | Boston, MA |
| Ziv Williams, MD | Neurosurgery | Boston, MA |
| Theresa L Williamson, MD | Neurosurgery | Providence, RI |
| Anne-Marie A Wills, MD MPH | Neurology | Boston, MA |
| Michael T Wilson, M.D. | Allergy/ Immunology | Boston, MA |
| Elliott J Winford, MD, MHS | Internal Medicine | Boston, MA |
| Jonathan R Wing, MD | Hospitalist | Boston, MA |
| Bryce Wininger, M.D. | Psychiatry | Boston, MA |
| John W Winkelman, PHD/MD | Psychiatry | Boston, MA |
| Jonathan M Winograd, MD | Plastic and Reconstructive Surgery | Boston, MA |
| Lori J Wirth, MD | Medical Oncology | Boston, MA |
| Cheryl Wisniewski | Nurse Practitioner | Boston, MA |
| Alison S Witkin, MD | Pulmonary Disease | Boston, MA |
| Leah Witkin, PA-C | Physician Assistant | Boston, MA |
| Elan Witkowski, M.D. | General Surgery | Boston, MA |
| Jennifer Wo, M.D. | Radiation Oncology | Boston, MA |
| Kamillus Wohlfeld, MD | Anesthesiology | Westwood, MA |
| Ruth Wohlfeld, MD | Anesthesiology | Westwood, MA |
| Katherine Wolcott, FNP | Nurse Practitioner | Rochester, NY |
| Alexander T Wolf, DNP, APRN, ACHPN | Nurse Practitioner | Boston, MA |
| Tate M Wolfe, M.D. | Anesthesiology | Boston, MA |
| Anna R Wolfson, M.D. | Allergy/ Immunology | Boston, MA |
| Alexandra K Wong, M.D. | Pulmonary Disease | Boston, MA |
| Bonnie Wong, PHD | Psychologist, Clinical | Brookline, MA |
| Johnson T Wong, MD | Allergy/ Immunology | Boston, MA |
| Peter A Wood, MD | Diagnostic Radiology | Boston, MA |
| Hillary L Woodworth, MD, PHD | Psychiatry | Boston, MA |
| Marcus J Wooten, MD | Emergency Medicine | Boston, MA |
| Daniel Worrall, ANP-BC | Nurse Practitioner | Boston, MA |
| Christopher M Worsham, M.D. | Critical Care (Intensivists) | Boston, MA |
| Jonathan L Worth, MD | Psychiatry | Boston, MA |
| Uchechi A Wosu, MD | Obstetrics & Gynecology | Boston, MA |
| Douglas E Wright, MD PHD | Hospitalist | Boston, MA |
| Kalen N Wright | Emergency Medicine | Boston, MA |
| Matthew F Wszolek, M.D. | Urology | Houston, TX |
| Chin-Lee Wu, MD PHD | Pathology | Boston, MA |
| Hong Wu | Pathology | Boston, MA |
| Nancy M Wu, MD | Anesthesiology | Boston, MA |
| Steven Wu, MD | Nephrology | Tucson, AZ |
| Vincent Wu, M.D. | Diagnostic Radiology | Boston, MA |
| Kendra E Wulczyn, MD | Nephrology | Boston, MA |
| Bridget S Wulfing, PA-C | Physician Assistant | Boston, MA |
| Ramnik J Xavier, MD | Gastroenterology | Boston, MA |
| Amanda S Xi, MD | Anesthesiology | Boston, MA |
| Fan Di Xia | Dermatology | Boston, MA |
| Jhoana C Yactayo, NP | Nurse Practitioner | Boston, MA |
| Bin Q Yang, MD | Advanced Heart Failure and Transplant Cardiology | Boston, MA |
Practice locations
Listed practice locations in Arkansas, California, Connecticut, District of Columbia, Florida, Georgia, Illinois, Massachusetts, Maryland, Michigan, Missouri, New Hampshire, Texas, Washington.
Source: CMS Doctors and Clinicians National Downloadable File, snapshot October 2, 2026.
Membership comes from the CMS Doctors and Clinicians file. CMS does not publish an end-of-year archive of it, so the current snapshot is applied to every data year. A clinician affiliated with several groups or hospitals appears on each of their pages. How group pages are built · Limitations