| Nurse practitioner | 104 |
| Physical therapist (private practice) | 31 |
| Internal medicine | 31 |
| Physician assistant | 28 |
| Family practice | 25 |
| Certified Registered Nurse Anesthetist (CRNA) | 16 |
| Mass Immunization Roster Billers | 14 |
| Chiropractic | 13 |
| Emergency medicine | 12 |
| Licensed clinical social worker | 11 |
| General surgery | 9 |
| Orthopedic surgery | 8 |
| Mental Health Counselors | 8 |
| Ophthalmology | 8 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 7 |
| Diagnostic Radiology | 7 |
| Occupational therapist (private practice) | 7 |
| Anesthesiology | 6 |
| Ambulatory Surgical Center | 6 |
| Psychiatry | 6 |
| Podiatry | 5 |
| Centralized Flu | 5 |
| Pediatric medicine | 5 |
| Otolaryngology | 5 |
| Obstetrics/gynecology | 5 |
| Cardiology | 5 |
| Interventional Pain Management (IPM) | 4 |
| Nephrology | 4 |
| Audiologist (billing independently) | 4 |
| Optometrist | 4 |
| Urology | 3 |
| Neurosurgery | 3 |
| Gastroenterology | 3 |
| Pulmonary disease | 3 |
| Allergy/immunology | 3 |
| Interventional Cardiology | 2 |
| Certified nurse midwife | 2 |
| Pathology | 2 |
| General practice | 2 |
| Physical medicine and rehabilitation | 2 |
| Pain Management | 2 |
| Marriage and Family Therapist | 2 |
| Clinical psychologist | 2 |
| Pharmacy | 2 |
| Critical care (intensivists) | 2 |
| Clinical Laboratory (Billing Independently) | 1 |
| Cardiac surgery | 1 |
| Neurology | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Thoracic surgery | 1 |
| Interventional radiology | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Infectious disease | 1 |
| Home Infusion Therapy Services | 1 |
| Opioid Treatment Program | 1 |
| Radiation oncology | 1 |
| Rheumatology | 1 |
| Anesthesiologist Assistant | 1 |
| Vascular surgery | 1 |
| Cardiac Electrophysiology | 1 |
| Hospitalist | 1 |
| Dermatology | 1 |