| Nurse practitioner | 70 |
| Family practice | 17 |
| Physician assistant | 15 |
| Physical therapist (private practice) | 13 |
| Licensed clinical social worker | 12 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 11 |
| Emergency medicine | 10 |
| Internal medicine | 10 |
| Certified Registered Nurse Anesthetist (CRNA) | 9 |
| Diagnostic Radiology | 9 |
| Optometrist | 8 |
| Mental Health Counselors | 6 |
| Mass Immunization Roster Billers | 4 |
| Cardiology | 4 |
| General surgery | 4 |
| Obstetrics/gynecology | 3 |
| Gastroenterology | 3 |
| Hematology/oncology | 3 |
| Podiatry | 3 |
| Psychiatry | 3 |
| Orthopedic surgery | 3 |
| Anesthesiology | 3 |
| General practice | 3 |
| Chiropractic | 3 |
| Clinical psychologist | 3 |
| Neurology | 2 |
| Marriage and Family Therapist | 2 |
| Ophthalmology | 2 |
| Certified nurse midwife | 2 |
| Radiation oncology | 2 |
| Pharmacy | 2 |
| Ambulatory Surgical Center | 2 |
| Nephrology | 2 |
| Urology | 2 |
| Pediatric medicine | 2 |
| Registered Dietician/Nutrition Professional | 1 |
| Vascular surgery | 1 |
| Hospice and Palliative Care | 1 |
| Pathology | 1 |
| Opioid Treatment Program | 1 |
| Plastic and reconstructive surgery | 1 |
| Pain Management | 1 |
| Hospitalist | 1 |
| Pulmonary disease | 1 |
| Dermatology | 1 |
| Neurosurgery | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Physical medicine and rehabilitation | 1 |
| Audiologist (billing independently) | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Interventional radiology | 1 |