| Nurse practitioner | 260 |
| Physician assistant | 148 |
| Family practice | 109 |
| Certified Registered Nurse Anesthetist (CRNA) | 87 |
| Physical therapist (private practice) | 62 |
| Hospitalist | 51 |
| Internal medicine | 42 |
| Optometrist | 36 |
| Anesthesiology | 36 |
| Emergency medicine | 33 |
| Obstetrics/gynecology | 33 |
| Mass Immunization Roster Billers | 32 |
| Psychiatry | 31 |
| Diagnostic Radiology | 31 |
| Clinical psychologist | 25 |
| Chiropractic | 24 |
| Orthopedic surgery | 24 |
| Licensed clinical social worker | 24 |
| Podiatry | 21 |
| General surgery | 21 |
| Mental Health Counselors | 21 |
| Ophthalmology | 17 |
| Pulmonary disease | 15 |
| Physical medicine and rehabilitation | 14 |
| Pathology | 14 |
| Gastroenterology | 14 |
| Occupational therapist (private practice) | 13 |
| Cardiology | 13 |
| Nephrology | 12 |
| Neurology | 11 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 11 |
| Urology | 10 |
| Otolaryngology | 10 |
| Interventional Cardiology | 9 |
| Certified nurse midwife | 9 |
| Dermatology | 9 |
| Hematology/oncology | 9 |
| Neurosurgery | 7 |
| Centralized Flu | 7 |
| Radiation oncology | 7 |
| Audiologist (billing independently) | 7 |
| Vascular surgery | 7 |
| Pediatric medicine | 7 |
| Critical care (intensivists) | 5 |
| Cardiac Electrophysiology | 5 |
| Infectious disease | 5 |
| Endocrinology | 5 |
| Sports Medicine | 3 |
| Colorectal surgery (formerly proctology) | 3 |
| Surgical oncology | 3 |
| Speech / language pathology | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Marriage and Family Therapist | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Hospice and Palliative Care | 2 |
| Gynecologist/oncologist | 2 |
| Interventional radiology | 2 |
| General practice | 2 |
| Rheumatology | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Geriatric medicine | 2 |
| Thoracic surgery | 2 |
| Hand surgery | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Pain Management | 1 |
| Ambulatory Surgical Center | 1 |
| Pharmacy | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Cardiac surgery | 1 |
| Opioid Treatment Program | 1 |
| Interventional Pain Management (IPM) | 1 |
| Oral surgery (dentists only) | 1 |
| Psychologist (billing independently) | 1 |
| Plastic and reconstructive surgery | 1 |