| Nurse practitioner | 297 |
| Physician assistant | 82 |
| Certified Registered Nurse Anesthetist (CRNA) | 73 |
| Internal medicine | 61 |
| Family practice | 54 |
| Physical therapist (private practice) | 46 |
| Emergency medicine | 38 |
| Mental Health Counselors | 29 |
| Chiropractic | 27 |
| Mass Immunization Roster Billers | 23 |
| Orthopedic surgery | 22 |
| Anesthesiology | 21 |
| Licensed clinical social worker | 19 |
| Optometrist | 19 |
| Obstetrics/gynecology | 17 |
| General surgery | 17 |
| Psychiatry | 15 |
| Centralized Flu | 12 |
| Cardiology | 12 |
| Neurology | 12 |
| Diagnostic Radiology | 10 |
| Dermatology | 10 |
| Hospitalist | 9 |
| Occupational therapist (private practice) | 9 |
| Podiatry | 9 |
| Otolaryngology | 9 |
| Gastroenterology | 8 |
| Ophthalmology | 8 |
| Pediatric medicine | 6 |
| Ambulatory Surgical Center | 6 |
| Urology | 6 |
| General practice | 6 |
| Pathology | 6 |
| Clinical Laboratory (Billing Independently) | 6 |
| Interventional Cardiology | 6 |
| Pulmonary disease | 5 |
| Pain Management | 5 |
| Nephrology | 5 |
| Infectious disease | 4 |
| Clinical psychologist | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Audiologist (billing independently) | 4 |
| Vascular surgery | 4 |
| Certified nurse midwife | 4 |
| Endocrinology | 4 |
| Cardiac Electrophysiology | 4 |
| Interventional radiology | 4 |
| Plastic and reconstructive surgery | 3 |
| Neurosurgery | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| Speech / language pathology | 3 |
| Rheumatology | 3 |
| Radiation oncology | 3 |
| Hematology/oncology | 3 |
| Thoracic surgery | 2 |
| Allergy/immunology | 2 |
| Marriage and Family Therapist | 2 |
| Nuclear medicine | 2 |
| Critical care (intensivists) | 2 |
| Physical medicine and rehabilitation | 2 |
| Medical oncology | 2 |
| Pharmacy | 1 |
| Hospice and Palliative Care | 1 |
| Maxillofacial surgery | 1 |
| Opioid Treatment Program | 1 |
| Home Infusion Therapy Services | 1 |
| Cardiac surgery | 1 |
| Preventive medicine | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Oral surgery (dentists only) | 1 |
| Undersea and Hyperbaric Medicine | 1 |
| Interventional Pain Management (IPM) | 1 |
| Sports Medicine | 1 |