| Nurse practitioner | 96 |
| Physician assistant | 40 |
| Internal medicine | 29 |
| Family practice | 23 |
| Licensed clinical social worker | 23 |
| Emergency medicine | 17 |
| Mass Immunization Roster Billers | 14 |
| Chiropractic | 11 |
| Psychiatry | 11 |
| Anesthesiology | 10 |
| Optometrist | 10 |
| Physical therapist (private practice) | 10 |
| Certified Registered Nurse Anesthetist (CRNA) | 9 |
| Hospitalist | 9 |
| Podiatry | 8 |
| Diagnostic Radiology | 8 |
| Orthopedic surgery | 7 |
| Obstetrics/gynecology | 7 |
| Cardiology | 6 |
| Pulmonary disease | 4 |
| Gastroenterology | 4 |
| General surgery | 4 |
| Clinical psychologist | 4 |
| Urology | 4 |
| Mental Health Counselors | 4 |
| Occupational therapist (private practice) | 3 |
| Ophthalmology | 3 |
| Plastic and reconstructive surgery | 3 |
| Endocrinology | 3 |
| Oral surgery (dentists only) | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Nephrology | 3 |
| Speech / language pathology | 2 |
| Pathology | 2 |
| Dermatology | 2 |
| Rheumatology | 2 |
| General practice | 2 |
| Pediatric medicine | 2 |
| Neurology | 2 |
| Audiologist (billing independently) | 2 |
| Cardiac surgery | 2 |
| Opioid Treatment Program | 1 |
| Hematology/oncology | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Sports Medicine | 1 |
| Vascular surgery | 1 |
| Medical oncology | 1 |
| Interventional radiology | 1 |
| Neurosurgery | 1 |
| Pain Management | 1 |
| Critical care (intensivists) | 1 |
| Physical medicine and rehabilitation | 1 |
| Infectious disease | 1 |
| Allergy/immunology | 1 |
| Radiation oncology | 1 |
| Hematology | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Dentist | 1 |
| Otolaryngology | 1 |
| Centralized Flu | 1 |
| Osteopathic manipulative therapy | 1 |
| Cardiac Electrophysiology | 1 |
| Preventive medicine | 1 |
| Certified nurse midwife | 1 |