| Nurse practitioner | 139 |
| Physician assistant | 77 |
| Certified Registered Nurse Anesthetist (CRNA) | 62 |
| Internal medicine | 53 |
| Family practice | 49 |
| Physical therapist (private practice) | 35 |
| Diagnostic Radiology | 28 |
| Emergency medicine | 26 |
| General surgery | 26 |
| Obstetrics/gynecology | 22 |
| Anesthesiology | 21 |
| Licensed clinical social worker | 18 |
| Gastroenterology | 15 |
| Nephrology | 15 |
| Neurology | 15 |
| Cardiology | 14 |
| Mental Health Counselors | 13 |
| Psychiatry | 13 |
| Orthopedic surgery | 12 |
| Optometrist | 11 |
| Pediatric medicine | 11 |
| Pathology | 10 |
| Chiropractic | 10 |
| Mass Immunization Roster Billers | 10 |
| Pulmonary disease | 9 |
| Urology | 8 |
| Ophthalmology | 7 |
| Physical medicine and rehabilitation | 7 |
| Registered Dietician/Nutrition Professional | 7 |
| Endocrinology | 7 |
| Infectious disease | 6 |
| Otolaryngology | 6 |
| Marriage and Family Therapist | 6 |
| Ambulatory Surgical Center | 5 |
| Interventional Cardiology | 5 |
| Podiatry | 5 |
| Hospitalist | 5 |
| Clinical psychologist | 5 |
| Dermatology | 5 |
| Audiologist (billing independently) | 5 |
| Anesthesiologist Assistant | 5 |
| Hematology/oncology | 4 |
| Neurosurgery | 4 |
| Plastic and reconstructive surgery | 4 |
| Surgical oncology | 4 |
| Centralized Flu | 4 |
| Speech / language pathology | 4 |
| Certified nurse midwife | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Rheumatology | 3 |
| Radiation oncology | 3 |
| Cardiac surgery | 3 |
| Pharmacy | 3 |
| Vascular surgery | 3 |
| Occupational therapist (private practice) | 3 |
| Cardiac Electrophysiology | 2 |
| Dentist | 2 |
| Medical Toxicology | 2 |
| Thoracic surgery | 2 |
| Interventional radiology | 2 |
| Medical oncology | 2 |
| Critical care (intensivists) | 2 |
| Allergy/immunology | 1 |
| Pain Management | 1 |
| Hospice and Palliative Care | 1 |
| Neuropsychiatry | 1 |