| HIGHMARK HEALTH O | WESTFIELD MEMORIAL HOSPITAL INC CCN 330801 | hospital | PA | 100% |
| HIGHMARK HEALTH O | PENN STATE HEALTH HOLY SPIRIT MEDICAL CENTER CCN 390004 | hospital | PA | 20% |
| HIGHMARK HEALTH O | SAINT VINCENT HEALTH CENTER CCN 390009 | hospital | PA | 100% |
| HIGHMARK HEALTH O | ALLE-KISKI MEDICAL CENTER CCN 390032 | hospital | PA | — |
| HIGHMARK HEALTH O | WEST PENN ALLEGHENY HEALTH SYSTEM, INC. CCN 390050 | hospital | PA | — |
| HIGHMARK HEALTH O | WEST PENN ALLEGHENY HEALTH SYSTEM, INC. CCN 390090 | hospital | PA | — |
| HIGHMARK HEALTH O | ST JOSEPH REGIONAL HEALTH NETWORK CCN 390096 | hospital | PA | 20% |
| HIGHMARK HEALTH O | CANONSBURG GENERAL HOSPITAL CCN 390160 | hospital | PA | — |
| HIGHMARK HEALTH O | THE MILTON S HERSHEY MEDICAL CENTER CCN 390256 | hospital | PA | 20% |
| HIGHMARK HEALTH O | JEFFERSON REGIONAL MEDICAL CENTER CCN 390265 | hospital | PA | — |
| HIGHMARK HEALTH O | GROVE CITY MEDICAL CENTER CCN 390266 | hospital | PA | 100% |
| HIGHMARK HEALTH O | WEST PENN ALLEGHENY HEALTH SYSTEM, INC. CCN 390267 | hospital | PA | — |
| HIGHMARK HEALTH O | AHN EMERUS WESTMORELAND LLC CCN 390333 | hospital | PA | 51% |
| HIGHMARK HEALTH O | WEST PENN ALLEGHENY HEALTH SYSTEM, INC. CCN 390334 | hospital | PA | — |
| HIGHMARK HEALTH O | PENN STATE HEALTH HAMPDEN MEDICAL CENTER CCN 390336 | hospital | PA | 20% |
| HIGHMARK HEALTH O | PENN STATE HEALTH LANCASTER MEDICAL CENTER CCN 390339 | hospital | PA | 20% |
| HIGHMARK HEALTH O | WARREN GENERAL HOSPITAL CCN 391319 | hospital | PA | 23% |
| HIGHMARK HEALTH O | CELTIC HOSPICE & PALLIATIVE CARE SERVICES, LLC CCN 391715 | hospice | PA | 48% |
| HIGHMARK HEALTH O | PENNSYLVANIA PSYCHIATRIC INSTITUTE CCN 394051 | hospital | PA | 20% |
| HIGHMARK HEALTH O | WARREN GENERAL HOSPITAL CCN 39M319 | hospital | PA | 23% |
| HIGHMARK HEALTH O | PENN STATE HEALTH HOLY SPIRIT MEDICAL CENTER CCN 39S004 | hospital | PA | 20% |
| HIGHMARK HEALTH O | SAINT VINCENT HEALTH CENTER CCN 39S009 | hospital | PA | 100% |
| HIGHMARK HEALTH O | ALLE-KISKI MEDICAL CENTER CCN 39S032 | hospital | PA | — |
| HIGHMARK HEALTH O | JEFFERSON REGIONAL MEDICAL CENTER CCN 39S265 | hospital | PA | — |
| HIGHMARK HEALTH O | WEST PENN ALLEGHENY HEALTH SYSTEM, INC. CCN 39S267 | hospital | PA | — |
| HIGHMARK HEALTH O | SAINT VINCENT HEALTH CENTER CCN 39T009 | hospital | PA | 100% |
| HIGHMARK HEALTH O | ALLE-KISKI MEDICAL CENTER CCN 39T032 | hospital | PA | — |
| HIGHMARK HEALTH O | WEST PENN ALLEGHENY HEALTH SYSTEM, INC. CCN 39T090 | hospital | PA | — |
| HIGHMARK HEALTH O | CANONSBURG GENERAL HOSPITAL CCN 39T160 | hospital | PA | — |
| HIGHMARK HEALTH O | JEFFERSON REGIONAL MEDICAL CENTER CCN 39T265 | hospital | PA | — |
| HIGHMARK HEALTH O | WARREN GENERAL HOSPITAL CCN 39Z319 | hospital | PA | 23% |
| HIGHMARK HEALTH O | CELTIC HEALTHCARE OF WESTMORELAND LLC | hha | PA | 60% |
| HIGHMARK HEALTH O | CELTIC HEALTHCARE OF WESTMORELAND LLC | hha | PA | 60% |
