| Nurse practitioner | 228 |
| Physician assistant | 226 |
| Internal medicine | 108 |
| Family practice | 78 |
| Licensed clinical social worker | 76 |
| Physical therapist (private practice) | 75 |
| Certified Registered Nurse Anesthetist (CRNA) | 73 |
| Emergency medicine | 52 |
| Obstetrics/gynecology | 46 |
| Mental Health Counselors | 46 |
| Optometrist | 32 |
| Anesthesiology | 32 |
| Mass Immunization Roster Billers | 32 |
| Diagnostic Radiology | 32 |
| General surgery | 27 |
| Psychiatry | 27 |
| Hospitalist | 25 |
| Clinical psychologist | 25 |
| Neurology | 22 |
| Orthopedic surgery | 21 |
| Chiropractic | 20 |
| Pediatric medicine | 19 |
| Cardiology | 19 |
| Ophthalmology | 18 |
| Occupational therapist (private practice) | 13 |
| Podiatry | 13 |
| Nephrology | 10 |
| Physical medicine and rehabilitation | 10 |
| Gastroenterology | 10 |
| Centralized Flu | 9 |
| Otolaryngology | 9 |
| Hematology/oncology | 8 |
| Infectious disease | 8 |
| Pathology | 6 |
| Audiologist (billing independently) | 6 |
| Urology | 6 |
| Neurosurgery | 6 |
| Pulmonary disease | 6 |
| Registered Dietician/Nutrition Professional | 5 |
| Interventional Cardiology | 5 |
| Vascular surgery | 5 |
| Medical oncology | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 4 |
| Endocrinology | 4 |
| Dermatology | 4 |
| Certified nurse midwife | 4 |
| Clinical Laboratory (Billing Independently) | 4 |
| Anesthesiologist Assistant | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Critical care (intensivists) | 3 |
| Radiation oncology | 3 |
| Osteopathic manipulative therapy | 3 |
| Unknown Provider | 3 |
| General practice | 3 |
| Pharmacy | 3 |
| Ambulatory Surgical Center | 3 |
| Geriatric medicine | 2 |
| Opioid Treatment Program | 2 |
| Speech / language pathology | 2 |
| Interventional radiology | 2 |
| Cardiac Electrophysiology | 2 |
| Hospice and Palliative Care | 1 |
| Pain Management | 1 |
| Psychologist (billing independently) | 1 |
| Allergy/immunology | 1 |
| Peripheral vascular disease | 1 |
| Dentist | 1 |
| Cardiac surgery | 1 |
| Thoracic surgery | 1 |
| Plastic and reconstructive surgery | 1 |
| Rheumatology | 1 |