| Nurse practitioner | 49 |
| Physician assistant | 45 |
| Physical therapist (private practice) | 43 |
| Licensed clinical social worker | 31 |
| Family practice | 31 |
| Chiropractic | 22 |
| Mental Health Counselors | 18 |
| Internal medicine | 13 |
| Anesthesiology | 11 |
| Certified Registered Nurse Anesthetist (CRNA) | 9 |
| Orthopedic surgery | 8 |
| Optometrist | 6 |
| Emergency medicine | 6 |
| Psychiatry | 6 |
| Occupational therapist (private practice) | 5 |
| Mass Immunization Roster Billers | 4 |
| Audiologist (billing independently) | 4 |
| Otolaryngology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Speech / language pathology | 4 |
| General surgery | 4 |
| Cardiology | 3 |
| Obstetrics/gynecology | 3 |
| Ophthalmology | 3 |
| Rheumatology | 2 |
| Hematology/oncology | 2 |
| Clinical psychologist | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Pulmonary disease | 2 |
| Diagnostic Radiology | 2 |
| Thoracic surgery | 1 |
| Physical medicine and rehabilitation | 1 |
| Podiatry | 1 |
| Hospitalist | 1 |
| Certified clinical nurse specialist | 1 |
| Allergy/immunology | 1 |
| Gynecologist/oncologist | 1 |
| Pathology | 1 |
| Gastroenterology | 1 |
| Dermatology | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Nephrology | 1 |
| Ambulatory Surgical Center | 1 |
| Medical oncology | 1 |
| Plastic and reconstructive surgery | 1 |
| Urology | 1 |
| Interventional Cardiology | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Marriage and Family Therapist | 1 |
| Neurology | 1 |
| Pharmacy | 1 |