| Physician assistant | 98 |
| Nurse practitioner | 60 |
| Certified Registered Nurse Anesthetist (CRNA) | 42 |
| Family practice | 37 |
| Emergency medicine | 21 |
| Internal medicine | 20 |
| Chiropractic | 17 |
| Cardiology | 16 |
| Anesthesiology | 14 |
| Licensed clinical social worker | 13 |
| General surgery | 12 |
| Optometrist | 12 |
| Diagnostic Radiology | 11 |
| Physical therapist (private practice) | 11 |
| Pediatric medicine | 10 |
| Mass Immunization Roster Billers | 9 |
| Orthopedic surgery | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 8 |
| Physical medicine and rehabilitation | 8 |
| Nephrology | 7 |
| Podiatry | 7 |
| Otolaryngology | 6 |
| Mental Health Counselors | 6 |
| Endocrinology | 6 |
| Neurology | 6 |
| Ophthalmology | 6 |
| Vascular surgery | 5 |
| Clinical psychologist | 5 |
| Hospitalist | 5 |
| Audiologist (billing independently) | 5 |
| Gastroenterology | 5 |
| Critical care (intensivists) | 5 |
| Obstetrics/gynecology | 5 |
| Dermatology | 4 |
| Infectious disease | 4 |
| Pathology | 4 |
| Pulmonary disease | 3 |
| Psychiatry | 3 |
| Urology | 3 |
| Hematology/oncology | 3 |
| Plastic and reconstructive surgery | 2 |
| Hospice and Palliative Care | 2 |
| Thoracic surgery | 2 |
| Cardiac Electrophysiology | 2 |
| Interventional Cardiology | 2 |
| Neurosurgery | 2 |
| Ambulatory Surgical Center | 2 |
| Allergy/immunology | 2 |
| Certified nurse midwife | 1 |
| Medical oncology | 1 |
| Centralized Flu | 1 |
| Rheumatology | 1 |
| Hematology | 1 |
| Interventional radiology | 1 |
| Marriage and Family Therapist | 1 |
| Geriatric medicine | 1 |
| Nuclear medicine | 1 |
| Gynecologist/oncologist | 1 |
| Pharmacy | 1 |
| Radiation oncology | 1 |
| Cardiac surgery | 1 |