| Nurse practitioner | 50 |
| Physician assistant | 33 |
| Family practice | 19 |
| Certified Registered Nurse Anesthetist (CRNA) | 13 |
| Optometrist | 11 |
| Emergency medicine | 11 |
| Internal medicine | 10 |
| Licensed clinical social worker | 9 |
| Physical therapist (private practice) | 7 |
| Obstetrics/gynecology | 7 |
| Chiropractic | 7 |
| Hospitalist | 6 |
| Cardiology | 6 |
| General surgery | 6 |
| Dermatology | 5 |
| Gastroenterology | 5 |
| Neurology | 4 |
| Podiatry | 4 |
| Psychiatry | 4 |
| Mass Immunization Roster Billers | 4 |
| Radiation oncology | 4 |
| Anesthesiology | 3 |
| Mental Health Counselors | 3 |
| Diagnostic Radiology | 3 |
| Orthopedic surgery | 3 |
| Marriage and Family Therapist | 2 |
| Occupational therapist (private practice) | 2 |
| Physical medicine and rehabilitation | 2 |
| Urology | 2 |
| Otolaryngology | 2 |
| Clinical psychologist | 2 |
| Pathology | 2 |
| Geriatric medicine | 1 |
| General practice | 1 |
| Pain Management | 1 |
| Infectious disease | 1 |
| Osteopathic manipulative therapy | 1 |
| Hand surgery | 1 |
| Audiologist (billing independently) | 1 |
| Pulmonary disease | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Hematology/oncology | 1 |
| Medical oncology | 1 |
| Nephrology | 1 |
| Registered Dietician/Nutrition Professional | 1 |