| Nurse practitioner | 103 |
| Physician assistant | 43 |
| Family practice | 43 |
| Licensed clinical social worker | 37 |
| Emergency medicine | 35 |
| Certified Registered Nurse Anesthetist (CRNA) | 22 |
| Physical therapist (private practice) | 22 |
| Mental Health Counselors | 21 |
| Internal medicine | 21 |
| Chiropractic | 14 |
| Anesthesiology | 12 |
| Optometrist | 12 |
| General surgery | 11 |
| Occupational therapist (private practice) | 10 |
| Orthopedic surgery | 9 |
| Obstetrics/gynecology | 8 |
| Pulmonary disease | 7 |
| Gastroenterology | 6 |
| Mass Immunization Roster Billers | 5 |
| Hospitalist | 5 |
| Physical medicine and rehabilitation | 4 |
| Psychiatry | 4 |
| Speech / language pathology | 4 |
| Cardiology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Clinical psychologist | 3 |
| Pediatric medicine | 3 |
| Urology | 3 |
| Diagnostic Radiology | 3 |
| Rheumatology | 3 |
| Audiologist (billing independently) | 3 |
| Podiatry | 2 |
| Endocrinology | 2 |
| Neurology | 2 |
| Certified nurse midwife | 2 |
| Nephrology | 2 |
| Ambulatory Surgical Center | 2 |
| Hematology/oncology | 2 |
| Ophthalmology | 1 |
| Neurosurgery | 1 |
| Cardiac Electrophysiology | 1 |
| Otolaryngology | 1 |
| Osteopathic manipulative therapy | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Radiation oncology | 1 |
| Pathology | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Infectious disease | 1 |
| Dermatology | 1 |
| Centralized Flu | 1 |