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; 1,701–1,800 of 2,771.
| Name | Specialty | City |
|---|---|---|
| Erin T Murphy-Davis, FNP | Nurse Practitioner | Belmont, MA |
| Amanda Murray, PA-C | Physician Assistant | Boston, MA |
| Olena K Murthy, CNP | Nurse Practitioner | Malden, MA |
| Victorine V Muse, MD | Diagnostic Radiology | Boston, MA |
| Rumbidzai C Mushavi, MD | Obstetrics & Gynecology | Boston, MA |
| Walter P Mutter, M.D. | Nephrology | Newton, MA |
| Christopher S Nabel, M.D., PH.D. | Hematology-Oncology | Boston, MA |
| Robert N Nace, M.D. | Physical Medicine and Rehabilitation | Cambridge, MA |
| Lisa B Nachtigall, MD | Endocrinology | Boston, MA |
| Eric S Nadel, MD | Emergency Medicine | Boston, MA |
| Amulya Nagarur, MD | Hospitalist | Boston, MA |
| Alexander Nagrebetsky, M.D. M.SC. | Anesthesiology | Chicago, IL |
| Ian H Nagus, PAC | Physician Assistant | Boston, MA |
| Brian V Nahed, MD | Neurosurgery | Boston, MA |
| Sravanthi Nandavaram, MD | Critical Care (Intensivists) | Boston, MA |
| Karen C Nanji, M.D. | Anesthesiology | Boston, MA |
| Emily Naoum, M.D. | Anesthesiology | Boston, MA |
| Gnankang S Napoe, MD, MS | Obstetrics & Gynecology | Boston, MA |
| Rupa Narayan, MD | Hematology-Oncology | Boston, MA |
| Uma Narayanasami, M.D. | Internal Medicine | Boston, MA |
| Valentina Nardi, MD | Pathology | Boston, MA |
| Vinod Narra, M.D. | General Surgery | Danvers, MA |
| Robert Nascimento, M.D. | Sports Medicine | Newton, MA |
| Alexis J Nason | Physician Assistant | Boston, MA |
| Najlla Nassery, MD | Internal Medicine | Boston, MA |
| Pradeep Natarajan, MD | Cardiology | Boston, MA |
| Sudha Natarajan, NP | Nurse Practitioner | Boston, MA |
| Barbara J Nath, MD | Gastroenterology | Boston, MA |
| David M Nathan, MD | Endocrinology | Boston, MA |
| Michael T Nathan, MD | Internal Medicine | Revere, MA |
| Rosalynn M Nazarian, MD | Pathology | Boston, MA |
| Victor A Neel, MD PHD | Dermatology | Boston, MA |
| Kay Negishi | Internal Medicine | Park City, UT |
| Alon Neidich, MD | Internal Medicine | Cambridge, MA |
| Anne M Neilan, M.D., M.P.H | Infectious Disease | Boston, MA |
| Tomas G Neilan, MD | Cardiology | Boston, MA |
| Michael D Nelson, M.D. | Internal Medicine | Boston, MA |
| Sandra B Nelson, M.D. | Infectious Disease | Boston, MA |
| Lauren M Nentwich, MD | Emergency Medicine | Boston, MA |
| Jacquelyn M Nestor, MD, PHD | Rheumatology | Boston, MA |
| Isabel P Neuringer, MD | Critical Care (Intensivists) | Boston, MA |
| Richard A Newcomb, MD | Hospitalist | Boston, MA |
| Amy Newhouse, M.D. | Psychiatry | Boston, MA |
| Erik T Newman, MD | Orthopedic Surgery | Boston, MA |
| Christopher H Newton-Cheh, MD MPH | Advanced Heart Failure and Transplant Cardiology | Boston, MA |
| Joshua S Ng, MDCM, MPH | General Surgery | Boston, MA |
| Sheung Chee Thomas Ng, M.D. PH.D | Diagnostic Radiology | Boston, MA |
| Jenny Nguyen | Physician Assistant | Boston, MA |
| Justin Nguyen, PA-C | Physician Assistant | Seattle, WA |
| Long Nguyen, M.D., M.S. | Gastroenterology | Boston, MA |
| Siena C Nguyen, MSN, FNP-C, BSN, RN | Nurse Practitioner | Boston, MA |
| Glen S Ni, MD | Anesthesiology | Stoughton, MA |
| Angela S Nichols, M.D. | Anesthesiology | Boston, MA |
| Katherine M Nichols, MD | Cardiology | Boston, MA |
| Gunnlaugur P Nielsen, MD | Pathology | Boston, MA |
| Andrew A Nierenberg, MD | Psychiatry | Boston, MA |
| Sagar U Nigwekar, MD | Nephrology | Boston, MA |
| Donna L Nimec, MD | Physical Medicine and Rehabilitation | Burlington, VT |
| Mingming Ning, MD | Neurology | Boston, MA |
| Mladen Nisavic, MD | Psychiatry | Boston, MA |
| Ha T Nishino, MD | Pathology | Boston, MA |
| Norman S Nishioka, MD | Gastroenterology | Boston, MA |
| Pitchaphon Nissaisorakarn, MD | Nephrology | Boston, MA |
| Holly Noel, ACNP | Nurse Practitioner | Boston, MA |
| Mary Norato Indeglia, NP | Nurse Practitioner | Boston, MA |
| Kaitlyn A Norcia, CNP | Nurse Practitioner | Boston, MA |
| Tyler Normile, PA-C | Physician Assistant | Boston, MA |
| Crystal M North, M.D. | Pulmonary Disease | Boston, MA |
| Kayla A Northam, APRN | Nurse Practitioner | Lebanon, NH |
| Maureen Nothnagle, PA-C | Physician Assistant | Boston, MA |
| Eric Nou, M.D. | Endocrinology | Wellesley, MA |
| Lisa C Novak, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Columbus, OH |
| Tetyana Novikova, NP | Nurse Practitioner | Brighton, MA |
| Anne Louise Oaklander, MD PHD | Neurology | Boston, MA |
| Derek H Oakley, MD, PHD | Pathology | Boston, MA |
| Gail M O'Brien, MD | Internal Medicine | Boston, MA |
| Sarah B O'Brien, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Westwood, MA |
| Julie M Obrien, MED, LMHC | Licensed Professional Counselor | Lexington, MA |
| Karen A Obrien, MD | Hospice and Palliative Care | Boston, MA |
| Todd M Obrien, MD | Orthopedic Surgery | Peabody, MA |
| Peter O Ochieng, M.D. | Anesthesiology | Boston, MA |
| Thao T O'Connor, C-FNP | Nurse Practitioner | Boston, MA |
| Kevin C Oconnor, MD | Physical Medicine and Rehabilitation | Boston, MA |
| Erin R O'Day, PA-C | Physician Assistant | Portland, ME |
| Bethany O'Dea | Nurse Practitioner | Boston, MA |
| Margaret R O'Dea, AGNP | Nurse Practitioner | Boston, MA |
| Casey O'Donnell, D.O., MBA | Physical Medicine and Rehabilitation | Hingham, MA |
| Evan A O'Donnell | Orthopedic Surgery | Boston, MA |
| Paul V O'Donnell, MD, PHD | Medical Oncology | Seattle, WA |
| Walter J O'Donnell, MD | Pulmonary Disease | Boston, MA |
| Michelle L O'Donoghue, M.D. | Cardiology | Boston, MA |
| Jessica N Odotei, NP | Nurse Practitioner | Boston, MA |
| Joseph O'Dowd, MD | Anesthesiology | Boston, MA |
| Kevin S Oh, M.D. | Radiation Oncology | Boston, MA |
| Sean M O'Hara, MD | Emergency Medicine | Boston, MA |
| Krystin Ojala, MS, PA-C, ATC | Physician Assistant | Boston, MA |
| Oluwadamilola F Ojutalayo, MD | Cardiology | Salem, MA |
| Daniel Okin, MD, PHD | Internal Medicine | Boston, MA |
| Johnny-Joshua U Okonkwo, MD | Neurology | Saint Louis, MO |
| Inessa Oks, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Westwood, 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