| Nurse practitioner | 78 |
| Internal medicine | 30 |
| Certified Registered Nurse Anesthetist (CRNA) | 25 |
| Family practice | 21 |
| Physician assistant | 21 |
| Emergency medicine | 15 |
| Chiropractic | 13 |
| Anesthesiology | 11 |
| Physical therapist (private practice) | 11 |
| Mass Immunization Roster Billers | 10 |
| Licensed clinical social worker | 10 |
| Obstetrics/gynecology | 6 |
| Cardiology | 6 |
| Ambulatory Surgical Center | 6 |
| Orthopedic surgery | 4 |
| General surgery | 4 |
| Audiologist (billing independently) | 4 |
| Gastroenterology | 4 |
| Hospitalist | 4 |
| Optometrist | 4 |
| Psychiatry | 3 |
| Neurology | 3 |
| Pulmonary disease | 3 |
| Hematology/oncology | 3 |
| Medical oncology | 2 |
| Public Health or Welfare Agencies (Federal, State, and local) | 2 |
| All other suppliers, e.g., Drug Stores | 2 |
| Diagnostic Radiology | 2 |
| Podiatry | 2 |
| Pain Management | 2 |
| Urology | 2 |
| Vascular surgery | 2 |
| Otolaryngology | 2 |
| Nephrology | 2 |
| Pharmacy | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Surgical oncology | 1 |
| Interventional Cardiology | 1 |
| Pathology | 1 |
| Ophthalmology | 1 |
| Rheumatology | 1 |
| Occupational therapist (private practice) | 1 |
| Dermatology | 1 |
| General practice | 1 |
| Opioid Treatment Program | 1 |
| Allergy/immunology | 1 |
| Plastic and reconstructive surgery | 1 |
| Endocrinology | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Critical care (intensivists) | 1 |
| Mental Health Counselors | 1 |
| Thoracic surgery | 1 |