| Nurse practitioner | 57 |
| Physician assistant | 50 |
| Family practice | 29 |
| Certified Registered Nurse Anesthetist (CRNA) | 19 |
| Internal medicine | 18 |
| Chiropractic | 18 |
| Emergency medicine | 12 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 12 |
| General surgery | 12 |
| Anesthesiology | 10 |
| Mental Health Counselors | 10 |
| Mass Immunization Roster Billers | 10 |
| Optometrist | 9 |
| Cardiology | 8 |
| Licensed clinical social worker | 8 |
| Physical therapist (private practice) | 8 |
| Diagnostic Radiology | 8 |
| Certified nurse midwife | 6 |
| Urology | 4 |
| Pulmonary disease | 4 |
| Ophthalmology | 4 |
| Psychiatry | 4 |
| Orthopedic surgery | 4 |
| Clinical psychologist | 4 |
| Podiatry | 4 |
| Obstetrics/gynecology | 3 |
| Audiologist (billing independently) | 3 |
| Pathology | 3 |
| Nephrology | 2 |
| Occupational therapist (private practice) | 2 |
| Hospitalist | 2 |
| Radiation oncology | 2 |
| Otolaryngology | 2 |
| Plastic and reconstructive surgery | 2 |
| Vascular surgery | 2 |
| General practice | 2 |
| Pharmacy | 2 |
| Thoracic surgery | 1 |
| Pediatric medicine | 1 |
| Addiction medicine | 1 |
| Rheumatology | 1 |
| Interventional Pain Management (IPM) | 1 |
| Gastroenterology | 1 |
| Hematology/oncology | 1 |
| Infectious disease | 1 |
| Physical medicine and rehabilitation | 1 |
| Interventional radiology | 1 |
| Endocrinology | 1 |
| Maxillofacial surgery | 1 |
| Neurology | 1 |
| Opioid Treatment Program | 1 |
| Medical oncology | 1 |
| Sports Medicine | 1 |
| Speech / language pathology | 1 |