| 621420 |
Substance abuse treatment centers and clinics (except hospitals), outpatient |
| 621491 |
Group hospitalization plans providing health care services |
| 621491 |
Health maintenance organization (HMO) medical centers and clinics |
| 621491 |
HMO (health maintenance organization) medical centers and clinics |
| 621492 |
Dialysis centers and clinics |
| 621492 |
Hemodialysis centers and clinics |
| 621492 |
Kidney dialysis centers and clinics |
| 621492 |
Renal dialysis centers and clinics |
| 621493 |
Ambulatory surgical centers and clinics, freestanding |
| 621493 |
Emergency medical centers and clinics, freestanding |