| Partners Healthcare International LLC | Disregarded entity | MED training | MA | 205281203 |
| PD Productions LLC | Disregarded entity | MED education | MA | 562383458 |
| Partners Private Care LLC | Disregarded entity | Home health | MA | 263871702 |
| Partners Healthcare System INC (phs) | Related tax-exempt org | Healthcare | MA | 043230035 |
| The Massachusetts General Hospital (mgh) | Related tax-exempt org | Healthcare | MA | 041564655 |
| The General Hospital Coporation | Related tax-exempt org | Healthcare | MA | 042697983 |
| Massachusetts General Physicians ORG | Related tax-exempt org | Healthcare | MA | 042807148 |
| The MGH Health Services Corporation | Related tax-exempt org | Healthcare | MA | 222717383 |
| Mclean Healthcare INC (mhc) | Related tax-exempt org | Admin support | MA | 204572876 |
| The Mclean Hospital Corporation | Related tax-exempt org | Healthcare | MA | 042697981 |
| Martha's Vineyard Hospital INC (mvh) | Related tax-exempt org | Healthcare | MA | 042104691 |
| WNR INC | Related tax-exempt org | Nursing SVCS. | MA | 043419920 |
| Nantucket Cottage Hospital (nch) | Related tax-exempt org | Healthcare | MA | 042103823 |
| Nantucket Cottage Hospital Foundation | Related tax-exempt org | Admin support | MA | 043829745 |
| Brigham & Women's Healthcare (bwhc) | Related tax-exempt org | Admin support | MA | 042921338 |
| The Brigham and Women's Hospital (bwh) | Related tax-exempt org | Healthcare | MA | 042312909 |
| Biosciences Research Foundation INC | Related tax-exempt org | Promote RES. | MA | 222483849 |
| BWH Research INC | Related tax-exempt org | MED research | MA | 043011445 |
| Brigham Community Practices INC | Related tax-exempt org | Healthcare | MA | 222588069 |
| Brigham and Women's PHYS ORG (bwpo) | Related tax-exempt org | Healthcare | MA | 043466314 |
| Brigham Medical RES & EDU Foundation | Related tax-exempt org | MED RES & EDU | MA | 043539249 |
| Brigham & Women's OB-GYN RES & EDU | Related tax-exempt org | MED RES & EDU | MA | 043494863 |
| Brigham Pathology RES & EDU Foundation | Related tax-exempt org | MED RES & EDU | MA | 043541111 |
| Brigham and Women's Faulkner Hosp(bwfh) | Related tax-exempt org | Healthcare | MA | 042768256 |
| Village Manor Nursing Home INC | Related tax-exempt org | Nursing home | MA | 042775265 |