| Nurse practitioner | 61 |
| Physician assistant | 36 |
| Family practice | 26 |
| Physical therapist (private practice) | 15 |
| Mass Immunization Roster Billers | 13 |
| Mental Health Counselors | 12 |
| Certified Registered Nurse Anesthetist (CRNA) | 12 |
| Hospitalist | 12 |
| Emergency medicine | 11 |
| Licensed clinical social worker | 10 |
| Chiropractic | 9 |
| Orthopedic surgery | 8 |
| Anesthesiology | 8 |
| Urology | 8 |
| Diagnostic Radiology | 8 |
| Certified nurse midwife | 7 |
| Internal medicine | 7 |
| Clinical psychologist | 7 |
| Optometrist | 6 |
| Obstetrics/gynecology | 6 |
| Cardiology | 6 |
| Gastroenterology | 5 |
| Podiatry | 5 |
| Hematology/oncology | 5 |
| Psychiatry | 5 |
| Pulmonary disease | 4 |
| General surgery | 4 |
| Endocrinology | 4 |
| Interventional Cardiology | 3 |
| Pathology | 3 |
| Medical oncology | 2 |
| Audiologist (billing independently) | 2 |
| Sports Medicine | 2 |
| Radiation oncology | 2 |
| Otolaryngology | 2 |
| Nephrology | 2 |
| Interventional Pain Management (IPM) | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Vascular surgery | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Occupational therapist (private practice) | 1 |
| Neurology | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Thoracic surgery | 1 |
| Ophthalmology | 1 |
| Centralized Flu | 1 |
| Psychologist (billing independently) | 1 |
| Rheumatology | 1 |