| Nurse practitioner | 139 |
| Internal medicine | 51 |
| Physician assistant | 50 |
| Family practice | 30 |
| Emergency medicine | 28 |
| Certified Registered Nurse Anesthetist (CRNA) | 24 |
| Anesthesiology | 19 |
| Physical therapist (private practice) | 19 |
| Optometrist | 18 |
| Chiropractic | 17 |
| General surgery | 16 |
| Diagnostic Radiology | 16 |
| Orthopedic surgery | 15 |
| Cardiology | 15 |
| Mass Immunization Roster Billers | 14 |
| Obstetrics/gynecology | 7 |
| Podiatry | 7 |
| Nephrology | 7 |
| Ambulatory Surgical Center | 6 |
| Dermatology | 6 |
| Hospitalist | 6 |
| Otolaryngology | 5 |
| Interventional Cardiology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Radiation oncology | 4 |
| Pulmonary disease | 4 |
| Ophthalmology | 4 |
| Pain Management | 4 |
| Psychiatry | 3 |
| Mental Health Counselors | 3 |
| General practice | 3 |
| Certified nurse midwife | 3 |
| Audiologist (billing independently) | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Gastroenterology | 2 |
| Hematology/oncology | 2 |
| Pharmacy | 2 |
| Licensed clinical social worker | 2 |
| Pathology | 2 |
| Infectious disease | 2 |
| Thoracic surgery | 2 |
| Critical care (intensivists) | 2 |
| Medical oncology | 2 |
| Clinical psychologist | 2 |
| Neurology | 2 |
| Pediatric medicine | 2 |
| Opioid Treatment Program | 2 |
| Interventional radiology | 1 |
| Hospice and Palliative Care | 1 |
| Centralized Flu | 1 |
| Endocrinology | 1 |
| Geriatric medicine | 1 |
| Occupational therapist (private practice) | 1 |
| Interventional Pain Management (IPM) | 1 |
| Urology | 1 |
| Physical medicine and rehabilitation | 1 |
| Neurosurgery | 1 |
| Rheumatology | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Cardiac surgery | 1 |
| Allergy/immunology | 1 |