| Nurse practitioner | 290 |
| Physician assistant | 79 |
| Certified Registered Nurse Anesthetist (CRNA) | 73 |
| Internal medicine | 67 |
| Family practice | 57 |
| Diagnostic Radiology | 36 |
| Emergency medicine | 36 |
| Anesthesiology | 34 |
| Chiropractic | 30 |
| Physical therapist (private practice) | 29 |
| General practice | 26 |
| Mental Health Counselors | 25 |
| Cardiology | 22 |
| Optometrist | 19 |
| Licensed clinical social worker | 19 |
| Podiatry | 16 |
| General surgery | 14 |
| Mass Immunization Roster Billers | 14 |
| Neurology | 14 |
| Obstetrics/gynecology | 13 |
| Psychiatry | 12 |
| Centralized Flu | 12 |
| Ophthalmology | 12 |
| Critical care (intensivists) | 11 |
| Orthopedic surgery | 11 |
| Urology | 11 |
| Clinical psychologist | 11 |
| Physical medicine and rehabilitation | 10 |
| Occupational therapist (private practice) | 9 |
| Otolaryngology | 9 |
| Pathology | 8 |
| Dermatology | 8 |
| Interventional Cardiology | 8 |
| Infectious disease | 7 |
| Pediatric medicine | 7 |
| Hematology/oncology | 7 |
| Pulmonary disease | 7 |
| Certified nurse midwife | 7 |
| Radiation oncology | 7 |
| Vascular surgery | 5 |
| Nephrology | 5 |
| Interventional radiology | 5 |
| Registered Dietician/Nutrition Professional | 5 |
| Ambulatory Surgical Center | 5 |
| Endocrinology | 4 |
| Audiologist (billing independently) | 4 |
| Pharmacy | 4 |
| Neurosurgery | 4 |
| Gastroenterology | 4 |
| Cardiac Electrophysiology | 3 |
| Pain Management | 3 |
| Plastic and reconstructive surgery | 3 |
| Medical oncology | 3 |
| Rheumatology | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Allergy/immunology | 2 |
| Geriatric medicine | 1 |
| Psychologist (billing independently) | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Opioid Treatment Program | 1 |
| Hospitalist | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Thoracic surgery | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Anesthesiologist Assistant | 1 |
| Gynecologist/oncologist | 1 |
| Osteopathic manipulative therapy | 1 |
| Interventional Pain Management (IPM) | 1 |