| Nurse practitioner | 86 |
| Family practice | 80 |
| Physician assistant | 50 |
| Certified Registered Nurse Anesthetist (CRNA) | 42 |
| Internal medicine | 35 |
| Emergency medicine | 28 |
| Physical therapist (private practice) | 26 |
| Optometrist | 21 |
| Anesthesiology | 18 |
| Mass Immunization Roster Billers | 13 |
| Chiropractic | 12 |
| Diagnostic Radiology | 11 |
| Orthopedic surgery | 10 |
| Obstetrics/gynecology | 10 |
| Licensed clinical social worker | 9 |
| Pathology | 9 |
| Clinical psychologist | 9 |
| Gastroenterology | 8 |
| General surgery | 8 |
| Ophthalmology | 7 |
| Psychiatry | 7 |
| Mental Health Counselors | 7 |
| Otolaryngology | 6 |
| Pulmonary disease | 6 |
| Audiologist (billing independently) | 6 |
| Dermatology | 5 |
| Centralized Flu | 5 |
| Urology | 5 |
| Podiatry | 5 |
| Hospitalist | 5 |
| Physical medicine and rehabilitation | 5 |
| Interventional Cardiology | 5 |
| Maxillofacial surgery | 4 |
| Occupational therapist (private practice) | 4 |
| Nephrology | 4 |
| Cardiology | 4 |
| Plastic and reconstructive surgery | 4 |
| Infectious disease | 4 |
| Neurosurgery | 3 |
| Rheumatology | 3 |
| Hand surgery | 3 |
| Hematology/oncology | 3 |
| Cardiac Electrophysiology | 3 |
| Radiation oncology | 3 |
| Neurology | 3 |
| Ambulatory Surgical Center | 2 |
| Certified nurse midwife | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Allergy/immunology | 2 |
| Pediatric medicine | 2 |
| Endocrinology | 2 |
| Medical oncology | 2 |
| Thoracic surgery | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Sports Medicine | 1 |
| Vascular surgery | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Opioid Treatment Program | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Psychologist (billing independently) | 1 |
| Hospice and Palliative Care | 1 |
| Pain Management | 1 |
| Pharmacy | 1 |
| Interventional radiology | 1 |
| Registered Dietician/Nutrition Professional | 1 |