| Nurse practitioner | 328 |
| Physical therapist (private practice) | 249 |
| Physician assistant | 202 |
| Family practice | 142 |
| Mental Health Counselors | 107 |
| Licensed clinical social worker | 105 |
| Internal medicine | 76 |
| Optometrist | 66 |
| Emergency medicine | 64 |
| Occupational therapist (private practice) | 62 |
| Chiropractic | 60 |
| Orthopedic surgery | 55 |
| Certified Registered Nurse Anesthetist (CRNA) | 50 |
| Anesthesiology | 49 |
| General surgery | 39 |
| Obstetrics/gynecology | 38 |
| Diagnostic Radiology | 34 |
| Mass Immunization Roster Billers | 31 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 24 |
| Psychiatry | 23 |
| Clinical psychologist | 22 |
| Speech / language pathology | 19 |
| Neurology | 16 |
| Hospitalist | 15 |
| Podiatry | 15 |
| Ophthalmology | 15 |
| Otolaryngology | 14 |
| Urology | 13 |
| Ambulatory Surgical Center | 12 |
| Cardiology | 12 |
| Dermatology | 10 |
| Registered Dietician/Nutrition Professional | 10 |
| Interventional Cardiology | 9 |
| Public Health or Welfare Agencies (Federal, State, and local) | 9 |
| Audiologist (billing independently) | 9 |
| Pharmacy | 8 |
| Independent Diagnostic Testing Facility (IDTF) | 7 |
| Pathology | 7 |
| Gastroenterology | 7 |
| Physical medicine and rehabilitation | 7 |
| Radiation oncology | 7 |
| Centralized Flu | 6 |
| Clinical Laboratory (Billing Independently) | 6 |
| Neurosurgery | 6 |
| Pulmonary disease | 6 |
| Certified nurse midwife | 6 |
| Hematology/oncology | 6 |
| Rheumatology | 5 |
| Marriage and Family Therapist | 5 |
| Pediatric medicine | 5 |
| Medical oncology | 4 |
| Infectious disease | 4 |
| Critical care (intensivists) | 4 |
| Nephrology | 3 |
| General practice | 3 |
| Thoracic surgery | 3 |
| Endocrinology | 3 |
| Plastic and reconstructive surgery | 3 |
| Allergy/immunology | 3 |
| Cardiac surgery | 2 |
| Psychologist (billing independently) | 2 |
| Cardiac Electrophysiology | 2 |
| Certified clinical nurse specialist | 2 |
| Vascular surgery | 2 |
| Surgical oncology | 1 |
| Hand surgery | 1 |
| Sleep Medicine | 1 |
| Medical Genetics and Genomics | 1 |
| Dentist | 1 |
| Hospice and Palliative Care | 1 |
| Pain Management | 1 |
| Unknown physician specialty | 1 |
| Unknown Provider | 1 |
| Anesthesiologist Assistant | 1 |