| Nurse practitioner | 75 |
| Physician assistant | 41 |
| Family practice | 22 |
| Mental Health Counselors | 16 |
| Anesthesiology | 15 |
| Emergency medicine | 14 |
| Hospitalist | 14 |
| Licensed clinical social worker | 13 |
| Optometrist | 12 |
| Orthopedic surgery | 12 |
| Internal medicine | 10 |
| Physical therapist (private practice) | 10 |
| Certified Registered Nurse Anesthetist (CRNA) | 10 |
| Pulmonary disease | 7 |
| Chiropractic | 7 |
| Diagnostic Radiology | 6 |
| Obstetrics/gynecology | 6 |
| Psychiatry | 6 |
| Urology | 5 |
| Ophthalmology | 4 |
| Podiatry | 4 |
| Interventional radiology | 4 |
| Clinical psychologist | 4 |
| Thoracic surgery | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Neurology | 3 |
| Mass Immunization Roster Billers | 3 |
| Cardiology | 3 |
| Interventional Cardiology | 3 |
| Neurosurgery | 3 |
| Gastroenterology | 3 |
| Medical oncology | 3 |
| Infectious disease | 2 |
| Dermatology | 2 |
| Plastic and reconstructive surgery | 2 |
| Preventive medicine | 2 |
| Pathology | 2 |
| Speech / language pathology | 2 |
| Critical care (intensivists) | 2 |
| Rheumatology | 2 |
| Vascular surgery | 1 |
| Physical medicine and rehabilitation | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Osteopathic manipulative therapy | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Hematology/oncology | 1 |
| General surgery | 1 |
| Endocrinology | 1 |
| Gynecologist/oncologist | 1 |
| Interventional Pain Management (IPM) | 1 |
| Sports Medicine | 1 |
| Cardiac Electrophysiology | 1 |
| Pediatric medicine | 1 |
| General practice | 1 |
| Centralized Flu | 1 |
| Otolaryngology | 1 |
| Nephrology | 1 |
| Certified clinical nurse specialist | 1 |
| Hand surgery | 1 |
| Audiologist (billing independently) | 1 |
| Radiation oncology | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Oral surgery (dentists only) | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Pain Management | 1 |
| Allergy/immunology | 1 |
| Geriatric medicine | 1 |