| Nurse practitioner | 125 |
| Certified Registered Nurse Anesthetist (CRNA) | 51 |
| Internal medicine | 46 |
| Physical therapist (private practice) | 22 |
| Family practice | 21 |
| Emergency medicine | 19 |
| Anesthesiology | 15 |
| Chiropractic | 14 |
| Obstetrics/gynecology | 13 |
| Physician assistant | 13 |
| Optometrist | 12 |
| Mass Immunization Roster Billers | 11 |
| Psychiatry | 10 |
| General surgery | 10 |
| Ophthalmology | 10 |
| Mental Health Counselors | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 8 |
| Neurology | 8 |
| Orthopedic surgery | 8 |
| Diagnostic Radiology | 7 |
| Centralized Flu | 7 |
| Dermatology | 7 |
| Gastroenterology | 7 |
| Hospitalist | 6 |
| Clinical Laboratory (Billing Independently) | 4 |
| Otolaryngology | 4 |
| Pathology | 4 |
| Ambulatory Surgical Center | 3 |
| Urology | 3 |
| Audiologist (billing independently) | 3 |
| Cardiology | 3 |
| Licensed clinical social worker | 3 |
| Critical care (intensivists) | 3 |
| Interventional Cardiology | 3 |
| Vascular surgery | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Pulmonary disease | 3 |
| Plastic and reconstructive surgery | 3 |
| Nephrology | 2 |
| Podiatry | 2 |
| Clinical psychologist | 2 |
| Maxillofacial surgery | 2 |
| Neurosurgery | 2 |
| Medical oncology | 2 |
| Pediatric medicine | 2 |
| Interventional radiology | 2 |
| Hematology/oncology | 2 |
| Allergy/immunology | 1 |
| Osteopathic manipulative therapy | 1 |
| Opioid Treatment Program | 1 |
| All other suppliers, e.g., Drug Stores | 1 |
| General practice | 1 |
| Sleep Medicine | 1 |
| Rheumatology | 1 |
| Endocrinology | 1 |
| Cardiac Electrophysiology | 1 |
| Oral surgery (dentists only) | 1 |
| Pharmacy | 1 |
| Physical medicine and rehabilitation | 1 |
| Sports Medicine | 1 |