| Novant Health Presbyterian Medical Center | Charlotte, NC | Acute Care Hospitals | 5 stars |
| Novant Health Rowan Medical Center | Salisbury, NC | Acute Care Hospitals | 4 stars |
| Novant Health Thomasville Medical Center | Thomasville, NC | Acute Care Hospitals | 3 stars |
| Novato Community Hospital | Novato, CA | Acute Care Hospitals | 5 stars |
| Ns/Lij Hs Huntington Hospital | Huntington, NY | Acute Care Hospitals | 5 stars |
| Ns/Lij Hs Southside Hospital | Bay Shore, NY | Acute Care Hospitals | 3 stars |
| NY Eye and Ear Infirmary of Mount Sinai | New York, NY | Acute Care Hospitals | Not rated |
| Nyack Hospital | Nyack, NY | Acute Care Hospitals | 2 stars |
| NYU Langone Hospitals | New York, NY | Acute Care Hospitals | 5 stars |
| O U Medical Center | Oklahoma City, OK | Acute Care Hospitals | 2 stars |
| O'Connor Hospital | Delhi, NY | Critical Access Hospitals | Not rated |
| Oaklawn Psychiatric Center Inc | Goshen, IN | Psychiatric | Not rated |
| Ochsner American Legion Hospital | Jennings, LA | Acute Care Hospitals | 2 stars |
| Ochsner Choctaw General | Butler, AL | Critical Access Hospitals | Not rated |
| Ochsner Lafayette General Medical Center | Lafayette, LA | Acute Care Hospitals | 3 stars |
| Ochsner Laird Hospital | Union, MS | Critical Access Hospitals | Not rated |
| Ochsner LSU Health Monroe | Monroe, LA | Acute Care Hospitals | 3 stars |
| Ochsner LSU Health Shreveport | Shreveport, LA | Acute Care Hospitals | 2 stars |
| Ochsner LSU Health Shreveport-St Mary Medical Cent | Shreveport, LA | Acute Care Hospitals | 2 stars |
| Ochsner Medical Center - Baton Rouge | Baton Rouge, LA | Acute Care Hospitals | 4 stars |
| Ochsner Medical Center Acute | New Orleans, LA | Acute Care Hospitals | 4 stars |
| Ochsner Medical Center-Kenner | Kenner, LA | Acute Care Hospitals | 4 stars |
| Ochsner Rush Hospital | Meridian, MS | Acute Care Hospitals | 3 stars |
| Ochsner Scott Regional | Morton, MS | Critical Access Hospitals | Not rated |
| Ochsner St Martin Hospital | Breaux Bridge, LA | Critical Access Hospitals | Not rated |
| Ochsner St Mary | Morgan City, LA | Acute Care Hospitals | 2 stars |
| Ochsner Stennis Memorial Hospital | De Kalb, MS | Critical Access Hospitals | Not rated |
| Ochsner University Hospital and Clinics | Lafayette, LA | Acute Care Hospitals | 3 stars |
| Ochsner Watkins Hospital | Quitman, MS | Critical Access Hospitals | Not rated |
| Oconomowoc Memorial Hospital | Oconomowoc, WI | Acute Care Hospitals | 5 stars |
| Ohio Valley Surgical Hospital | Springfield, OH | Acute Care Hospitals | Not rated |
| Ohiohealth Mansfield Hospital | Mansfield, OH | Acute Care Hospitals | 3 stars |
| Ohiohealth Shelby Hospital | Shelby, OH | Critical Access Hospitals | 4 stars |
| Olivia Hospital & Clinic | Olivia, MN | Critical Access Hospitals | 2 stars |
| Olmsted Medical Center | Rochester, MN | Acute Care Hospitals | 4 stars |
| Oneida Health Hospital | Oneida, NY | Acute Care Hospitals | 2 stars |
| Orchard Hospital | Gridley, CA | Critical Access Hospitals | Not rated |
| Orem Community Hospital | Orem, UT | Acute Care Hospitals | Not rated |
| Orlando Health | Orlando, FL | Acute Care Hospitals | 4 stars |
| Orlando Health Bayfront Hospital | Saint Petersburg, FL | Acute Care Hospitals | 2 stars |
| Orlando Health Melbourne Hospital | Melbourne, FL | Acute Care Hospitals | 3 stars |
| Orlando Health Sebastian River Hospital | Sebastian, FL | Acute Care Hospitals | 4 stars |
| Oroville Hospital | Oroville, CA | Acute Care Hospitals | 1 star |
| Orthopaedic Hospital at Parkview North | Fort Wayne, IN | Acute Care Hospitals | Not rated |
| Osceola Community Hospital | Sibley, IA | Critical Access Hospitals | Not rated |
| OSF Saint Elizabeth Mdl Ctr | Peru, IL | Acute Care Hospitals | 3 stars |
| OSF Saint Katharine Medical Center | Dixon, IL | Acute Care Hospitals | 2 stars |
| OSF Saint Luke Medical Center | Kewanee, IL | Critical Access Hospitals | 4 stars |
| Osmond General Hospital | Osmond, NE | Critical Access Hospitals | Not rated |
| Oswego Hospital | Oswego, NY | Acute Care Hospitals | 3 stars |