| Nurse practitioner | 338 |
| Physician assistant | 209 |
| Family practice | 153 |
| Physical therapist (private practice) | 151 |
| Certified Registered Nurse Anesthetist (CRNA) | 126 |
| Licensed clinical social worker | 89 |
| Internal medicine | 76 |
| Optometrist | 74 |
| Chiropractic | 72 |
| Mass Immunization Roster Billers | 48 |
| Anesthesiology | 41 |
| Marriage and Family Therapist | 36 |
| Clinical psychologist | 36 |
| Emergency medicine | 36 |
| Mental Health Counselors | 35 |
| General surgery | 32 |
| Orthopedic surgery | 32 |
| Obstetrics/gynecology | 29 |
| Diagnostic Radiology | 25 |
| Cardiology | 21 |
| Audiologist (billing independently) | 19 |
| Psychiatry | 17 |
| Occupational therapist (private practice) | 14 |
| Ophthalmology | 13 |
| Centralized Flu | 13 |
| Speech / language pathology | 12 |
| Hospitalist | 11 |
| Gastroenterology | 11 |
| Ambulatory Surgical Center | 11 |
| Urology | 9 |
| Pathology | 9 |
| Pulmonary disease | 8 |
| Pediatric medicine | 8 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 7 |
| Hematology/oncology | 7 |
| Clinical Laboratory (Billing Independently) | 7 |
| Rheumatology | 7 |
| Neurology | 7 |
| Critical care (intensivists) | 6 |
| Registered Dietician/Nutrition Professional | 6 |
| Neurosurgery | 6 |
| Otolaryngology | 6 |
| Podiatry | 6 |
| Plastic and reconstructive surgery | 5 |
| Infectious disease | 5 |
| Nephrology | 5 |
| Dermatology | 5 |
| Certified clinical nurse specialist | 5 |
| Pharmacy | 4 |
| Vascular surgery | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 4 |
| Radiation oncology | 4 |
| Physical medicine and rehabilitation | 3 |
| Endocrinology | 2 |
| Pain Management | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Maxillofacial surgery | 2 |
| Cardiac Electrophysiology | 2 |
| Cardiac surgery | 1 |
| Hand surgery | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Interventional radiology | 1 |
| Surgical oncology | 1 |
| Sleep Medicine | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Sports Medicine | 1 |
| Psychologist (billing independently) | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| General practice | 1 |
| Unknown Provider | 1 |