Largest groups
| Group | City | Clinicians |
|---|---|---|
| Brigham And Womens Physicians Organization INC | Boston | 201 |
| Massachusetts General Physicians Organization INC | Boston | 183 |
| Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr INC | Boston | 111 |
| Umass Memorial Medical Group INC | Worcester | 104 |
| Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is | Newburyport | 99 |
| Pratt Anesthesiology Associates INC | Boston | 84 |
| Chmc Anesthesia Foundation INC | Boston | 70 |
| Baystate Medical Practices INC | Springfield | 69 |
| Lahey Clinic INC | Burlington | 66 |
| Lawrence Anesthesia Services LLC | Worcester | 61 |
| Commonwealth Anesthesia Associates, INC | Newton | 59 |
| Bmc Affiliated Physicians, INC. | Brockton | 54 |
| Boston University Medical Center Anesthesiologists INC | Boston | 49 |
| Southcoast Physicians Group INC | New Bedford | 43 |
| Capa Anesthesia LLC | Weymouth | 43 |
| Massachusetts Eye And Ear Associates, INC | Boston | 42 |
| Lowell Anesthesiology Service INC | Lowell | 42 |
| Lifespan Physician Group Of Massachusetts INC | Fall River | 37 |
| Coastal Medical Associates | Weymouth | 32 |
| Cape Cod Anesthesia Associates, INC | Hyannis | 29 |
| Mass General Brigham Medical Group, INC. | Burlington | 29 |
| Mass General Brigham Medical Group Western Massachusetts INC | Northampton | 27 |
| Winchester Anesthesia Associates, INC | Winchester | 27 |
| Emerson Practice Associates Ii, INC | Concord | 24 |
| Berkshire Medical Center INC | Pittsfield | 21 |
Group size mix
| Clinicians per group ID | Group IDs |
|---|---|
| 1 | 22 |
| 2 to 4 | 17 |
| 5 to 9 | 11 |
| 10 to 24 | 14 |
| 25 or more | 23 |
Source: CMS Doctors and Clinicians National Downloadable File. Counts are Medicare enrollment records, not a full census.
