| Nurse practitioner | 102 |
| Physician assistant | 67 |
| Physical therapist (private practice) | 43 |
| Internal medicine | 35 |
| Emergency medicine | 26 |
| Certified Registered Nurse Anesthetist (CRNA) | 23 |
| Family practice | 23 |
| General surgery | 20 |
| Diagnostic Radiology | 19 |
| Obstetrics/gynecology | 16 |
| Anesthesiology | 13 |
| Psychiatry | 13 |
| Licensed clinical social worker | 12 |
| Mental Health Counselors | 12 |
| Cardiology | 8 |
| Chiropractic | 8 |
| Neurology | 7 |
| Mass Immunization Roster Billers | 7 |
| Optometrist | 6 |
| Gastroenterology | 6 |
| Ophthalmology | 5 |
| Neurosurgery | 4 |
| Hospitalist | 4 |
| Physical medicine and rehabilitation | 4 |
| Occupational therapist (private practice) | 4 |
| Orthopedic surgery | 4 |
| Centralized Flu | 4 |
| Critical care (intensivists) | 3 |
| Clinical psychologist | 3 |
| Pulmonary disease | 3 |
| Thoracic surgery | 3 |
| Hematology/oncology | 3 |
| Pathology | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Nephrology | 2 |
| Podiatry | 2 |
| Ambulatory Surgical Center | 2 |
| Audiologist (billing independently) | 2 |
| Vascular surgery | 2 |
| Urology | 2 |
| Certified nurse midwife | 2 |
| Radiation oncology | 2 |
| Rheumatology | 2 |
| Maxillofacial surgery | 2 |
| Endocrinology | 2 |
| Addiction medicine | 1 |
| Plastic and reconstructive surgery | 1 |
| Interventional Cardiology | 1 |
| Interventional Pain Management (IPM) | 1 |
| Opioid Treatment Program | 1 |
| Infectious disease | 1 |
| Psychologist (billing independently) | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Allergy/immunology | 1 |
| Marriage and Family Therapist | 1 |
| Dermatology | 1 |
| Cardiac Electrophysiology | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Otolaryngology | 1 |
| Hospice and Palliative Care | 1 |
| Sports Medicine | 1 |