| Nurse practitioner | 109 |
| Physician assistant | 73 |
| Family practice | 46 |
| Internal medicine | 45 |
| Certified Registered Nurse Anesthetist (CRNA) | 34 |
| Licensed clinical social worker | 33 |
| Emergency medicine | 24 |
| Mental Health Counselors | 23 |
| Physical therapist (private practice) | 22 |
| Chiropractic | 20 |
| Obstetrics/gynecology | 15 |
| Optometrist | 14 |
| Occupational therapist (private practice) | 12 |
| Psychiatry | 12 |
| General surgery | 9 |
| Cardiology | 9 |
| Orthopedic surgery | 8 |
| Anesthesiology | 8 |
| Certified nurse midwife | 7 |
| Mass Immunization Roster Billers | 7 |
| Clinical psychologist | 6 |
| Ophthalmology | 6 |
| Hospitalist | 5 |
| Critical care (intensivists) | 5 |
| Podiatry | 5 |
| Neurology | 4 |
| Centralized Flu | 4 |
| Urology | 4 |
| Interventional Cardiology | 4 |
| Vascular surgery | 4 |
| Radiation oncology | 4 |
| Pharmacy | 4 |
| Gastroenterology | 3 |
| Neurosurgery | 3 |
| Diagnostic Radiology | 3 |
| Hematology/oncology | 3 |
| Otolaryngology | 3 |
| Rheumatology | 3 |
| Audiologist (billing independently) | 3 |
| Nephrology | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Allergy/immunology | 2 |
| Pulmonary disease | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Physical medicine and rehabilitation | 2 |
| Plastic and reconstructive surgery | 2 |
| Endocrinology | 2 |
| Sleep Medicine | 1 |
| Sports Medicine | 1 |
| Ambulatory Surgical Center | 1 |
| Dermatology | 1 |
| Marriage and Family Therapist | 1 |
| Cardiac surgery | 1 |
| Oral surgery (dentists only) | 1 |
| Hospice and Palliative Care | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Thoracic surgery | 1 |
| Pain Management | 1 |
| General practice | 1 |
| Opioid Treatment Program | 1 |
| Medical oncology | 1 |
| Pathology | 1 |