| Nurse practitioner | 204 |
| Physician assistant | 128 |
| Family practice | 79 |
| Certified Registered Nurse Anesthetist (CRNA) | 64 |
| Internal medicine | 45 |
| Mass Immunization Roster Billers | 30 |
| Mental Health Counselors | 29 |
| Emergency medicine | 29 |
| Physical therapist (private practice) | 27 |
| Anesthesiology | 27 |
| Obstetrics/gynecology | 24 |
| Chiropractic | 24 |
| Licensed clinical social worker | 22 |
| Psychiatry | 17 |
| Optometrist | 17 |
| Diagnostic Radiology | 17 |
| Orthopedic surgery | 16 |
| General surgery | 15 |
| Hospitalist | 14 |
| Cardiology | 14 |
| Pulmonary disease | 11 |
| Occupational therapist (private practice) | 10 |
| Otolaryngology | 9 |
| Podiatry | 9 |
| Gastroenterology | 8 |
| Ophthalmology | 8 |
| Urology | 8 |
| Certified nurse midwife | 7 |
| Registered Dietician/Nutrition Professional | 7 |
| Audiologist (billing independently) | 7 |
| Dermatology | 7 |
| Centralized Flu | 7 |
| Neurology | 7 |
| Physical medicine and rehabilitation | 6 |
| Interventional Cardiology | 6 |
| Ambulatory Surgical Center | 6 |
| Pathology | 5 |
| Nephrology | 4 |
| Pediatric medicine | 4 |
| Infectious disease | 4 |
| Clinical psychologist | 3 |
| Neurosurgery | 3 |
| Thoracic surgery | 3 |
| Cardiac Electrophysiology | 3 |
| Opioid Treatment Program | 3 |
| Vascular surgery | 3 |
| Unknown physician specialty | 3 |
| Pharmacy | 3 |
| Hematology/oncology | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Marriage and Family Therapist | 2 |
| Gynecologist/oncologist | 2 |
| Endocrinology | 2 |
| Radiation oncology | 2 |
| Pain Management | 2 |
| Medical oncology | 2 |
| Speech / language pathology | 2 |
| Cardiac surgery | 1 |
| Surgical oncology | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Addiction medicine | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Oral surgery (dentists only) | 1 |
| Plastic and reconstructive surgery | 1 |
| Geriatric medicine | 1 |
| Rheumatology | 1 |