| Nurse practitioner | 73 |
| Physical therapist (private practice) | 36 |
| Licensed clinical social worker | 27 |
| Mental Health Counselors | 25 |
| Physician assistant | 23 |
| Family practice | 19 |
| Internal medicine | 15 |
| Anesthesiology | 11 |
| Optometrist | 11 |
| Chiropractic | 10 |
| Emergency medicine | 10 |
| Orthopedic surgery | 8 |
| Occupational therapist (private practice) | 8 |
| Diagnostic Radiology | 7 |
| Certified Registered Nurse Anesthetist (CRNA) | 6 |
| Psychiatry | 6 |
| Obstetrics/gynecology | 6 |
| General surgery | 5 |
| Ophthalmology | 5 |
| Gastroenterology | 4 |
| Hospitalist | 4 |
| Hematology/oncology | 4 |
| Thoracic surgery | 3 |
| Neurosurgery | 3 |
| Mass Immunization Roster Billers | 3 |
| Pulmonary disease | 3 |
| Interventional Cardiology | 3 |
| Urology | 3 |
| Speech / language pathology | 3 |
| Nephrology | 2 |
| Dermatology | 2 |
| Otolaryngology | 2 |
| Certified nurse midwife | 2 |
| Clinical psychologist | 2 |
| Cardiology | 2 |
| Neurology | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Cardiac Electrophysiology | 2 |
| Pathology | 2 |
| Podiatry | 2 |
| Radiation oncology | 2 |
| Audiologist (billing independently) | 2 |
| Medical oncology | 1 |
| General practice | 1 |
| Endocrinology | 1 |
| Infectious disease | 1 |
| Centralized Flu | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Ambulatory Surgical Center | 1 |
| Marriage and Family Therapist | 1 |
| Physical medicine and rehabilitation | 1 |
| Pain Management | 1 |
| Pharmacy | 1 |
| Rheumatology | 1 |
| Unknown physician specialty | 1 |
| Pediatric medicine | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Allergy/immunology | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Plastic and reconstructive surgery | 1 |
| Registered Dietician/Nutrition Professional | 1 |