| Nurse practitioner | 111 |
| Family practice | 48 |
| Physician assistant | 37 |
| Certified Registered Nurse Anesthetist (CRNA) | 36 |
| Mental Health Counselors | 28 |
| Licensed clinical social worker | 25 |
| Hospitalist | 22 |
| Physical therapist (private practice) | 21 |
| Emergency medicine | 21 |
| Internal medicine | 19 |
| Anesthesiology | 18 |
| Chiropractic | 13 |
| General surgery | 11 |
| Optometrist | 10 |
| Clinical psychologist | 10 |
| Obstetrics/gynecology | 8 |
| Urology | 7 |
| Orthopedic surgery | 7 |
| Diagnostic Radiology | 7 |
| Gastroenterology | 6 |
| Podiatry | 6 |
| Interventional Cardiology | 6 |
| Mass Immunization Roster Billers | 6 |
| Speech / language pathology | 5 |
| Psychiatry | 5 |
| Neurology | 4 |
| Pharmacy | 4 |
| Nephrology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Certified nurse midwife | 3 |
| Vascular surgery | 3 |
| Ophthalmology | 3 |
| Ambulatory Surgical Center | 3 |
| Hematology/oncology | 3 |
| Physical medicine and rehabilitation | 2 |
| Centralized Flu | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Dermatology | 2 |
| Otolaryngology | 2 |
| Plastic and reconstructive surgery | 2 |
| Pain Management | 2 |
| Hand surgery | 2 |
| Pulmonary disease | 2 |
| Infectious disease | 2 |
| Endocrinology | 2 |
| Marriage and Family Therapist | 1 |
| Hospice and Palliative Care | 1 |
| Certified clinical nurse specialist | 1 |
| Sports Medicine | 1 |
| Occupational therapist (private practice) | 1 |
| Pathology | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Surgical oncology | 1 |
| Cardiology | 1 |
| Allergy/immunology | 1 |
| Oral surgery (dentists only) | 1 |
| Neurosurgery | 1 |
| Osteopathic manipulative therapy | 1 |
| Cardiac Electrophysiology | 1 |
| Radiation oncology | 1 |