| Nurse practitioner | 56 |
| Family practice | 32 |
| Internal medicine | 31 |
| Emergency medicine | 28 |
| Physical therapist (private practice) | 26 |
| Physician assistant | 18 |
| Clinical Laboratory (Billing Independently) | 15 |
| Mass Immunization Roster Billers | 15 |
| Psychiatry | 14 |
| Certified Registered Nurse Anesthetist (CRNA) | 13 |
| Obstetrics/gynecology | 12 |
| Ophthalmology | 12 |
| Diagnostic Radiology | 12 |
| Optometrist | 11 |
| Anesthesiology | 9 |
| General surgery | 9 |
| Orthopedic surgery | 7 |
| Marriage and Family Therapist | 6 |
| Hospitalist | 6 |
| Clinical psychologist | 5 |
| Nephrology | 5 |
| Podiatry | 5 |
| Cardiology | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| Ambulatory Surgical Center | 3 |
| Dermatology | 3 |
| Licensed clinical social worker | 3 |
| Urology | 3 |
| Rheumatology | 3 |
| Pharmacy | 2 |
| General practice | 2 |
| Centralized Flu | 2 |
| Critical care (intensivists) | 2 |
| Interventional radiology | 2 |
| Gastroenterology | 2 |
| Pulmonary disease | 2 |
| Pathology | 2 |
| Chiropractic | 2 |
| Neurology | 2 |
| Opioid Treatment Program | 2 |
| Plastic and reconstructive surgery | 1 |
| Occupational therapist (private practice) | 1 |
| Cardiac Electrophysiology | 1 |
| Hospice and Palliative Care | 1 |
| Allergy/immunology | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Pediatric medicine | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Mental Health Counselors | 1 |
| Physical medicine and rehabilitation | 1 |
| Osteopathic manipulative therapy | 1 |
| Radiation oncology | 1 |
| Intensive Cardiac Rehabilitation | 1 |
| Infectious disease | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Otolaryngology | 1 |
| Endocrinology | 1 |
| Certified nurse midwife | 1 |