| Nurse practitioner | 173 |
| Physician assistant | 112 |
| Internal medicine | 85 |
| Family practice | 74 |
| Certified Registered Nurse Anesthetist (CRNA) | 53 |
| Emergency medicine | 41 |
| Physical therapist (private practice) | 36 |
| Mass Immunization Roster Billers | 26 |
| Obstetrics/gynecology | 26 |
| General surgery | 24 |
| Mental Health Counselors | 23 |
| Cardiology | 21 |
| Diagnostic Radiology | 20 |
| Anesthesiology | 19 |
| Optometrist | 18 |
| Psychiatry | 16 |
| Podiatry | 16 |
| Orthopedic surgery | 14 |
| Neurology | 13 |
| Ophthalmology | 11 |
| Pediatric medicine | 10 |
| Chiropractic | 10 |
| Gastroenterology | 8 |
| Neurosurgery | 8 |
| Occupational therapist (private practice) | 8 |
| Pathology | 8 |
| Centralized Flu | 7 |
| Ambulatory Surgical Center | 7 |
| Clinical Laboratory (Billing Independently) | 7 |
| Pulmonary disease | 6 |
| Hospitalist | 6 |
| Licensed clinical social worker | 6 |
| Nephrology | 6 |
| Dermatology | 5 |
| Urology | 5 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 5 |
| Clinical psychologist | 5 |
| Pharmacy | 5 |
| Physical medicine and rehabilitation | 5 |
| Endocrinology | 4 |
| Allergy/immunology | 4 |
| Radiation oncology | 3 |
| Critical care (intensivists) | 3 |
| Hematology/oncology | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Otolaryngology | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| General practice | 2 |
| Vascular surgery | 2 |
| Thoracic surgery | 2 |
| Rheumatology | 2 |
| Cardiac surgery | 2 |
| Interventional Pain Management (IPM) | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Infectious disease | 2 |
| Cardiac Electrophysiology | 2 |
| Medical oncology | 2 |
| Maxillofacial surgery | 2 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Geriatric medicine | 1 |
| Certified nurse midwife | 1 |
| Medicare Diabetes Preventive Program | 1 |
| Speech / language pathology | 1 |
| Surgical oncology | 1 |
| Interventional Cardiology | 1 |
| Pain Management | 1 |
| Opioid Treatment Program | 1 |
| Marriage and Family Therapist | 1 |