| Nurse practitioner | 38 |
| Physician assistant | 36 |
| Family practice | 29 |
| Internal medicine | 17 |
| Physical therapist (private practice) | 14 |
| Anesthesiology | 12 |
| Obstetrics/gynecology | 12 |
| Marriage and Family Therapist | 11 |
| Optometrist | 11 |
| Orthopedic surgery | 9 |
| Emergency medicine | 9 |
| Diagnostic Radiology | 9 |
| Chiropractic | 9 |
| Psychiatry | 8 |
| Mass Immunization Roster Billers | 8 |
| Hospitalist | 7 |
| Licensed clinical social worker | 7 |
| General surgery | 6 |
| Dermatology | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 5 |
| Podiatry | 5 |
| Interventional Cardiology | 5 |
| Nephrology | 4 |
| Neurology | 4 |
| Hematology/oncology | 4 |
| Otolaryngology | 4 |
| Cardiology | 3 |
| Ophthalmology | 3 |
| Critical care (intensivists) | 3 |
| Pathology | 3 |
| Centralized Flu | 3 |
| Interventional radiology | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Vascular surgery | 2 |
| Mental Health Counselors | 2 |
| Gastroenterology | 2 |
| Opioid Treatment Program | 2 |
| Ambulatory Surgical Center | 2 |
| Clinical psychologist | 1 |
| Pulmonary disease | 1 |
| Pediatric medicine | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Medical oncology | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Urology | 1 |
| Hand surgery | 1 |
| Audiologist (billing independently) | 1 |
| Cardiac Electrophysiology | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Rheumatology | 1 |
| Radiation oncology | 1 |
| Allergy/immunology | 1 |
| Plastic and reconstructive surgery | 1 |
| Physical medicine and rehabilitation | 1 |
| Certified nurse midwife | 1 |
| Cardiac surgery | 1 |
| Thoracic surgery | 1 |