| Licensed clinical social worker | 73 |
| Nurse practitioner | 63 |
| Physician assistant | 61 |
| Family practice | 58 |
| Physical therapist (private practice) | 38 |
| Internal medicine | 27 |
| Clinical psychologist | 23 |
| Chiropractic | 16 |
| Psychiatry | 14 |
| Emergency medicine | 12 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 12 |
| Mental Health Counselors | 11 |
| Anesthesiology | 11 |
| Mass Immunization Roster Billers | 10 |
| Certified nurse midwife | 10 |
| Optometrist | 9 |
| Diagnostic Radiology | 9 |
| Obstetrics/gynecology | 8 |
| Podiatry | 7 |
| General surgery | 6 |
| Cardiology | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 5 |
| Urology | 5 |
| Ophthalmology | 4 |
| Speech / language pathology | 4 |
| Otolaryngology | 3 |
| Pathology | 3 |
| Pediatric medicine | 3 |
| Radiation oncology | 3 |
| Hospitalist | 3 |
| Marriage and Family Therapist | 3 |
| Dermatology | 3 |
| Centralized Flu | 3 |
| Occupational therapist (private practice) | 3 |
| Neurology | 3 |
| Cardiac surgery | 2 |
| Orthopedic surgery | 2 |
| Pulmonary disease | 2 |
| Interventional radiology | 2 |
| Critical care (intensivists) | 2 |
| Neurosurgery | 2 |
| Sports Medicine | 2 |
| Rheumatology | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Physical medicine and rehabilitation | 2 |
| Gastroenterology | 2 |
| Nephrology | 2 |
| Sleep Medicine | 1 |
| Audiologist (billing independently) | 1 |
| Pain Management | 1 |
| Vascular surgery | 1 |
| Addiction medicine | 1 |
| Hand surgery | 1 |
| Hematology/oncology | 1 |
| Infectious disease | 1 |
| Endocrinology | 1 |
| Radiation Therapy Centers | 1 |
| Osteopathic manipulative therapy | 1 |
| Plastic and reconstructive surgery | 1 |
| Cardiac Electrophysiology | 1 |
| Geriatric medicine | 1 |
| Pharmacy | 1 |
| Gynecologist/oncologist | 1 |