| Nurse practitioner | 90 |
| Physician assistant | 55 |
| Family practice | 51 |
| Certified Registered Nurse Anesthetist (CRNA) | 40 |
| Chiropractic | 23 |
| Physical therapist (private practice) | 23 |
| Mental Health Counselors | 21 |
| Anesthesiology | 17 |
| Emergency medicine | 17 |
| Internal medicine | 17 |
| Diagnostic Radiology | 17 |
| Hospitalist | 15 |
| Orthopedic surgery | 14 |
| Optometrist | 14 |
| General surgery | 12 |
| Podiatry | 10 |
| Licensed clinical social worker | 9 |
| Neurology | 9 |
| Occupational therapist (private practice) | 7 |
| Obstetrics/gynecology | 7 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 6 |
| Clinical psychologist | 6 |
| Psychiatry | 6 |
| Gastroenterology | 6 |
| Mass Immunization Roster Billers | 6 |
| Dermatology | 6 |
| Physical medicine and rehabilitation | 5 |
| Otolaryngology | 5 |
| Pathology | 5 |
| Audiologist (billing independently) | 5 |
| Urology | 5 |
| Ambulatory Surgical Center | 4 |
| Ophthalmology | 4 |
| Hematology/oncology | 4 |
| Registered Dietician/Nutrition Professional | 4 |
| Nephrology | 4 |
| Vascular surgery | 3 |
| Hand surgery | 3 |
| Cardiology | 3 |
| Cardiac Electrophysiology | 3 |
| Thoracic surgery | 3 |
| Interventional Cardiology | 3 |
| Centralized Flu | 2 |
| Nuclear medicine | 2 |
| Pulmonary disease | 2 |
| Endocrinology | 2 |
| Critical care (intensivists) | 2 |
| Marriage and Family Therapist | 2 |
| Allergy/immunology | 2 |
| Pain Management | 2 |
| Infectious disease | 1 |
| Rheumatology | 1 |
| Pediatric medicine | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Opioid Treatment Program | 1 |
| Gynecologist/oncologist | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Plastic and reconstructive surgery | 1 |
| Cardiac surgery | 1 |
| General practice | 1 |
| Neurosurgery | 1 |
| Speech / language pathology | 1 |
| Pharmacy | 1 |