| Nurse practitioner | 142 |
| Physician assistant | 100 |
| Family practice | 67 |
| Internal medicine | 67 |
| Physical therapist (private practice) | 46 |
| Certified Registered Nurse Anesthetist (CRNA) | 44 |
| Chiropractic | 43 |
| Licensed clinical social worker | 42 |
| Mental Health Counselors | 40 |
| Marriage and Family Therapist | 34 |
| Optometrist | 26 |
| Anesthesiology | 25 |
| Diagnostic Radiology | 19 |
| Orthopedic surgery | 17 |
| Clinical psychologist | 16 |
| Obstetrics/gynecology | 16 |
| Emergency medicine | 15 |
| Mass Immunization Roster Billers | 12 |
| General surgery | 12 |
| Registered Dietician/Nutrition Professional | 11 |
| Ophthalmology | 11 |
| Occupational therapist (private practice) | 11 |
| Podiatry | 10 |
| Psychiatry | 10 |
| Neurology | 9 |
| Cardiology | 8 |
| Physical medicine and rehabilitation | 6 |
| Urology | 6 |
| Pathology | 5 |
| Speech / language pathology | 5 |
| Dermatology | 5 |
| Nephrology | 5 |
| Gastroenterology | 5 |
| Plastic and reconstructive surgery | 4 |
| Dentist | 4 |
| Hospitalist | 4 |
| Otolaryngology | 4 |
| Pediatric medicine | 4 |
| Certified clinical nurse specialist | 4 |
| Neurosurgery | 3 |
| Hospice and Palliative Care | 3 |
| Endocrinology | 3 |
| Thoracic surgery | 3 |
| Hematology/oncology | 3 |
| Critical care (intensivists) | 3 |
| Pulmonary disease | 3 |
| Centralized Flu | 3 |
| Clinical Laboratory (Billing Independently) | 3 |
| Vascular surgery | 2 |
| Radiation oncology | 2 |
| Ambulatory Surgical Center | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Interventional Cardiology | 2 |
| Certified nurse midwife | 2 |
| Audiologist (billing independently) | 2 |
| Sleep Medicine | 1 |
| Interventional radiology | 1 |
| Opioid Treatment Program | 1 |
| Infectious disease | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Pharmacy | 1 |