| Physician assistant | 82 |
| Nurse practitioner | 62 |
| Family practice | 37 |
| Certified Registered Nurse Anesthetist (CRNA) | 33 |
| Physical therapist (private practice) | 27 |
| Emergency medicine | 22 |
| Chiropractic | 21 |
| Internal medicine | 20 |
| Optometrist | 16 |
| General surgery | 13 |
| Mass Immunization Roster Billers | 12 |
| Anesthesiology | 12 |
| Obstetrics/gynecology | 11 |
| Diagnostic Radiology | 9 |
| Podiatry | 9 |
| Neurology | 7 |
| Clinical psychologist | 7 |
| Cardiology | 7 |
| Psychiatry | 6 |
| Mental Health Counselors | 6 |
| Licensed clinical social worker | 6 |
| Orthopedic surgery | 5 |
| Endocrinology | 5 |
| Physical medicine and rehabilitation | 5 |
| Urology | 4 |
| Occupational therapist (private practice) | 4 |
| Critical care (intensivists) | 4 |
| Audiologist (billing independently) | 4 |
| Radiation oncology | 4 |
| Gastroenterology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Pathology | 3 |
| Otolaryngology | 3 |
| Ophthalmology | 3 |
| Ambulatory Surgical Center | 3 |
| Vascular surgery | 3 |
| Centralized Flu | 3 |
| Nephrology | 3 |
| Speech / language pathology | 2 |
| Marriage and Family Therapist | 2 |
| Pulmonary disease | 2 |
| Certified nurse midwife | 2 |
| Rheumatology | 2 |
| Hospitalist | 2 |
| Hematology/oncology | 2 |
| Allergy/immunology | 2 |
| Neurosurgery | 2 |
| Opioid Treatment Program | 1 |
| Pain Management | 1 |
| Interventional radiology | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Medical oncology | 1 |
| Dermatology | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Plastic and reconstructive surgery | 1 |
| Osteopathic manipulative therapy | 1 |
| Interventional Cardiology | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Surgical oncology | 1 |
| General practice | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Oral surgery (dentists only) | 1 |