| Nurse practitioner | 73 |
| Physician assistant | 40 |
| Mental Health Counselors | 19 |
| Physical therapist (private practice) | 18 |
| Family practice | 18 |
| Licensed clinical social worker | 15 |
| Certified Registered Nurse Anesthetist (CRNA) | 12 |
| Hospitalist | 11 |
| Chiropractic | 11 |
| Anesthesiology | 11 |
| Emergency medicine | 11 |
| Obstetrics/gynecology | 10 |
| Mass Immunization Roster Billers | 8 |
| Diagnostic Radiology | 8 |
| Clinical psychologist | 7 |
| Neurology | 6 |
| Internal medicine | 6 |
| Optometrist | 5 |
| Gastroenterology | 5 |
| Psychiatry | 5 |
| Orthopedic surgery | 5 |
| Neurosurgery | 4 |
| Pathology | 4 |
| Ophthalmology | 4 |
| Certified nurse midwife | 4 |
| General surgery | 3 |
| Occupational therapist (private practice) | 3 |
| Hematology/oncology | 3 |
| Dermatology | 3 |
| Pulmonary disease | 3 |
| Podiatry | 3 |
| Cardiology | 3 |
| Audiologist (billing independently) | 2 |
| Vascular surgery | 2 |
| Radiation oncology | 2 |
| Gynecologist/oncologist | 2 |
| Cardiac Electrophysiology | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Opioid Treatment Program | 1 |
| Home Infusion Therapy Services | 1 |
| Critical care (intensivists) | 1 |
| Urology | 1 |
| Centralized Flu | 1 |
| Rheumatology | 1 |
| Surgical oncology | 1 |
| Pain Management | 1 |
| Dentist | 1 |
| Nephrology | 1 |
| Medical oncology | 1 |
| Osteopathic manipulative therapy | 1 |
| Otolaryngology | 1 |
| Certified clinical nurse specialist | 1 |
| Sports Medicine | 1 |
| Interventional Cardiology | 1 |
| Endocrinology | 1 |
| Allergy/immunology | 1 |
| Thoracic surgery | 1 |
| Geriatric medicine | 1 |
| Interventional Pain Management (IPM) | 1 |
| Infectious disease | 1 |
| Physical medicine and rehabilitation | 1 |