| Nurse practitioner | 110 |
| Internal medicine | 38 |
| Family practice | 32 |
| Physician assistant | 31 |
| Emergency medicine | 23 |
| Anesthesiology | 22 |
| Physical therapist (private practice) | 14 |
| Cardiology | 11 |
| Orthopedic surgery | 10 |
| Diagnostic Radiology | 10 |
| Optometrist | 9 |
| Gastroenterology | 8 |
| Obstetrics/gynecology | 8 |
| Hospitalist | 8 |
| Hematology/oncology | 8 |
| Certified nurse midwife | 7 |
| General surgery | 7 |
| Urology | 6 |
| Mass Immunization Roster Billers | 5 |
| Pulmonary disease | 5 |
| Neurology | 5 |
| Psychiatry | 4 |
| Nephrology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Critical care (intensivists) | 4 |
| Ophthalmology | 4 |
| Physical medicine and rehabilitation | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| Chiropractic | 3 |
| Rheumatology | 3 |
| Endocrinology | 3 |
| Licensed clinical social worker | 3 |
| Centralized Flu | 3 |
| Otolaryngology | 3 |
| Vascular surgery | 3 |
| Interventional radiology | 3 |
| Pediatric medicine | 3 |
| Interventional Cardiology | 3 |
| Pathology | 3 |
| Podiatry | 2 |
| Speech / language pathology | 2 |
| Cardiac surgery | 2 |
| Allergy/immunology | 2 |
| Certified Registered Nurse Anesthetist (CRNA) | 2 |
| Dermatology | 2 |
| General practice | 2 |
| Clinical psychologist | 2 |
| Registered Dietician/Nutrition Professional | 1 |
| Nuclear medicine | 1 |
| Ambulatory Surgical Center | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Audiologist (billing independently) | 1 |
| Thoracic surgery | 1 |
| Mental Health Counselors | 1 |
| Occupational therapist (private practice) | 1 |
| Plastic and reconstructive surgery | 1 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 1 |
| Cardiac Electrophysiology | 1 |
| Radiation oncology | 1 |