| Physician assistant | 79 |
| Nurse practitioner | 49 |
| Physical therapist (private practice) | 40 |
| Family practice | 36 |
| Chiropractic | 26 |
| Internal medicine | 23 |
| Certified Registered Nurse Anesthetist (CRNA) | 22 |
| Optometrist | 19 |
| Emergency medicine | 17 |
| Clinical psychologist | 13 |
| Hospitalist | 12 |
| Anesthesiology | 12 |
| Psychiatry | 11 |
| Obstetrics/gynecology | 11 |
| Mental Health Counselors | 10 |
| Licensed clinical social worker | 10 |
| Audiologist (billing independently) | 10 |
| Mass Immunization Roster Billers | 9 |
| Orthopedic surgery | 9 |
| Diagnostic Radiology | 9 |
| Dermatology | 8 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 8 |
| General surgery | 6 |
| Ophthalmology | 6 |
| Cardiology | 6 |
| Gastroenterology | 6 |
| Otolaryngology | 5 |
| Pulmonary disease | 4 |
| Urology | 4 |
| Nephrology | 4 |
| Registered Dietician/Nutrition Professional | 3 |
| Pathology | 3 |
| Neurology | 3 |
| Sports Medicine | 3 |
| Podiatry | 3 |
| Occupational therapist (private practice) | 3 |
| Physical medicine and rehabilitation | 3 |
| Allergy/immunology | 3 |
| Ambulatory Surgical Center | 2 |
| Radiation oncology | 2 |
| Plastic and reconstructive surgery | 2 |
| Sleep Medicine | 2 |
| Speech / language pathology | 2 |
| Opioid Treatment Program | 1 |
| Hospice and Palliative Care | 1 |
| Oral surgery (dentists only) | 1 |
| Marriage and Family Therapist | 1 |
| Maxillofacial surgery | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| General Psychiatry | 1 |
| Centralized Flu | 1 |
| Hematology/oncology | 1 |
| Pharmacy | 1 |