| Nurse practitioner | 89 |
| Physician assistant | 59 |
| Family practice | 37 |
| Physical therapist (private practice) | 37 |
| Mental Health Counselors | 29 |
| Anesthesiology | 25 |
| Licensed clinical social worker | 23 |
| Internal medicine | 20 |
| Emergency medicine | 20 |
| Chiropractic | 18 |
| Optometrist | 13 |
| Clinical psychologist | 11 |
| Obstetrics/gynecology | 11 |
| Hospitalist | 10 |
| Mass Immunization Roster Billers | 10 |
| Orthopedic surgery | 9 |
| Occupational therapist (private practice) | 9 |
| Certified Registered Nurse Anesthetist (CRNA) | 8 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 8 |
| Podiatry | 7 |
| Centralized Flu | 7 |
| Cardiology | 6 |
| Pathology | 5 |
| Hematology/oncology | 5 |
| Pulmonary disease | 5 |
| Psychiatry | 4 |
| Ambulatory Surgical Center | 4 |
| Diagnostic Radiology | 4 |
| Gastroenterology | 4 |
| Neurology | 4 |
| Endocrinology | 3 |
| General surgery | 3 |
| Physical medicine and rehabilitation | 3 |
| Urology | 3 |
| Pain Management | 2 |
| Pediatric medicine | 2 |
| Sports Medicine | 2 |
| Critical care (intensivists) | 2 |
| Dermatology | 2 |
| Allergy/immunology | 2 |
| Interventional radiology | 2 |
| Ophthalmology | 2 |
| Interventional Cardiology | 2 |
| Cardiac Electrophysiology | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Nephrology | 1 |
| Hospice and Palliative Care | 1 |
| Otolaryngology | 1 |
| Certified nurse midwife | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Infectious disease | 1 |
| Radiation oncology | 1 |
| Marriage and Family Therapist | 1 |
| Undersea and Hyperbaric Medicine | 1 |
| Interventional Pain Management (IPM) | 1 |
| Pharmacy | 1 |
| Audiologist (billing independently) | 1 |
| Rheumatology | 1 |
| Speech / language pathology | 1 |
| Opioid Treatment Program | 1 |