| Nurse practitioner | 83 |
| Internal medicine | 29 |
| Family practice | 24 |
| Physician assistant | 19 |
| Emergency medicine | 18 |
| Diagnostic Radiology | 13 |
| Anesthesiology | 13 |
| Mass Immunization Roster Billers | 10 |
| Mental Health Counselors | 10 |
| Chiropractic | 9 |
| Obstetrics/gynecology | 9 |
| Licensed clinical social worker | 9 |
| Psychiatry | 9 |
| Optometrist | 8 |
| Physical therapist (private practice) | 7 |
| Dermatology | 5 |
| Gastroenterology | 5 |
| Orthopedic surgery | 5 |
| Cardiology | 4 |
| Hospitalist | 4 |
| General surgery | 4 |
| Pathology | 4 |
| Nephrology | 4 |
| Urology | 4 |
| Audiologist (billing independently) | 3 |
| Podiatry | 3 |
| Clinical psychologist | 3 |
| Certified nurse midwife | 3 |
| Thoracic surgery | 3 |
| Ophthalmology | 3 |
| General practice | 3 |
| Certified clinical nurse specialist | 3 |
| Radiation oncology | 2 |
| Occupational therapist (private practice) | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Certified Registered Nurse Anesthetist (CRNA) | 2 |
| Hematology/oncology | 2 |
| Rheumatology | 2 |
| Pain Management | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Neurology | 2 |
| Infectious disease | 2 |
| Hospice and Palliative Care | 1 |
| Physical medicine and rehabilitation | 1 |
| Endocrinology | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Plastic and reconstructive surgery | 1 |
| Opioid Treatment Program | 1 |
| Pharmacy | 1 |
| Otolaryngology | 1 |
| Maxillofacial surgery | 1 |
| Pulmonary disease | 1 |
| Neurosurgery | 1 |