| Nurse practitioner | 4 |
| Mass Immunization Roster Billers | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Emergency medicine | 2 |
| Psychiatry | 1 |
| Audiologist (billing independently) | 1 |
| General surgery | 1 |
| Physical therapist (private practice) | 1 |
| Obstetrics/gynecology | 1 |
| Chiropractic | 1 |
| Internal medicine | 1 |
| Urology | 1 |