| Physician assistant | 48 |
| Nurse practitioner | 43 |
| Physical therapist (private practice) | 40 |
| Family practice | 26 |
| Certified Registered Nurse Anesthetist (CRNA) | 22 |
| Chiropractic | 17 |
| Internal medicine | 16 |
| Optometrist | 13 |
| Psychiatry | 10 |
| Emergency medicine | 9 |
| General surgery | 9 |
| Anesthesiology | 7 |
| Osteopathic manipulative therapy | 7 |
| Orthopedic surgery | 6 |
| Diagnostic Radiology | 6 |
| Obstetrics/gynecology | 6 |
| Certified nurse midwife | 5 |
| Speech / language pathology | 5 |
| Licensed clinical social worker | 5 |
| Urology | 4 |
| Cardiology | 4 |
| Clinical psychologist | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Ophthalmology | 3 |
| Neurology | 3 |
| Pathology | 3 |
| Mental Health Counselors | 3 |
| Mass Immunization Roster Billers | 3 |
| Medical oncology | 2 |
| Ambulatory Surgical Center | 2 |
| Podiatry | 2 |
| Endocrinology | 2 |
| Allergy/immunology | 1 |
| Hospitalist | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Interventional Pain Management (IPM) | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Pain Management | 1 |
| Pediatric medicine | 1 |
| Audiologist (billing independently) | 1 |
| Dermatology | 1 |
| Otolaryngology | 1 |
| Maxillofacial surgery | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Oral surgery (dentists only) | 1 |
| Sleep Medicine | 1 |
| Neurosurgery | 1 |
| Plastic and reconstructive surgery | 1 |