| Nurse practitioner | 118 |
| Physician assistant | 77 |
| Certified Registered Nurse Anesthetist (CRNA) | 57 |
| Anesthesiology | 52 |
| Internal medicine | 42 |
| Physical therapist (private practice) | 33 |
| Family practice | 32 |
| Orthopedic surgery | 26 |
| Diagnostic Radiology | 23 |
| Obstetrics/gynecology | 23 |
| Pediatric medicine | 21 |
| Emergency medicine | 21 |
| General surgery | 19 |
| Chiropractic | 17 |
| Pathology | 16 |
| Neurology | 15 |
| Cardiology | 14 |
| Mass Immunization Roster Billers | 13 |
| Mental Health Counselors | 11 |
| Otolaryngology | 10 |
| Psychiatry | 10 |
| Optometrist | 10 |
| Hematology/oncology | 10 |
| Dermatology | 10 |
| Rheumatology | 8 |
| Gastroenterology | 8 |
| Licensed clinical social worker | 8 |
| Plastic and reconstructive surgery | 7 |
| Ophthalmology | 7 |
| Podiatry | 6 |
| Audiologist (billing independently) | 6 |
| Neurosurgery | 6 |
| Radiation oncology | 6 |
| Centralized Flu | 5 |
| Ambulatory Surgical Center | 5 |
| Pulmonary disease | 5 |
| Occupational therapist (private practice) | 5 |
| Clinical psychologist | 4 |
| Endocrinology | 4 |
| Colorectal surgery (formerly proctology) | 4 |
| Clinical Laboratory (Billing Independently) | 4 |
| Thoracic surgery | 3 |
| Interventional Pain Management (IPM) | 3 |
| Interventional Cardiology | 3 |
| Vascular surgery | 3 |
| Speech / language pathology | 3 |
| Urology | 3 |
| Critical care (intensivists) | 3 |
| Physical medicine and rehabilitation | 3 |
| Allergy/immunology | 2 |
| Interventional radiology | 2 |
| Anesthesiologist Assistant | 2 |
| Sports Medicine | 2 |
| Nephrology | 2 |
| Infectious disease | 2 |
| Sleep Medicine | 1 |
| Cardiac Electrophysiology | 1 |
| Surgical oncology | 1 |
| Certified nurse midwife | 1 |
| Medical oncology | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Hospitalist | 1 |
| Maxillofacial surgery | 1 |
| Pharmacy | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |