| Nurse practitioner | 324 |
| Family practice | 75 |
| Internal medicine | 65 |
| Emergency medicine | 53 |
| Mental Health Counselors | 39 |
| Mass Immunization Roster Billers | 37 |
| Anesthesiology | 34 |
| Physician assistant | 33 |
| Optometrist | 32 |
| Physical therapist (private practice) | 31 |
| Certified Registered Nurse Anesthetist (CRNA) | 31 |
| Chiropractic | 22 |
| General surgery | 21 |
| Orthopedic surgery | 19 |
| Cardiology | 19 |
| Diagnostic Radiology | 17 |
| Licensed clinical social worker | 15 |
| Obstetrics/gynecology | 15 |
| Centralized Flu | 13 |
| Ophthalmology | 13 |
| Psychiatry | 13 |
| Pediatric medicine | 12 |
| Audiologist (billing independently) | 12 |
| Neurology | 11 |
| Podiatry | 10 |
| Gastroenterology | 10 |
| Otolaryngology | 9 |
| Dermatology | 9 |
| Interventional Cardiology | 8 |
| Urology | 7 |
| Pathology | 7 |
| Thoracic surgery | 7 |
| Clinical psychologist | 7 |
| Plastic and reconstructive surgery | 6 |
| Endocrinology | 6 |
| Physical medicine and rehabilitation | 6 |
| Nephrology | 6 |
| Rheumatology | 6 |
| Medical oncology | 6 |
| Ambulatory Surgical Center | 6 |
| Independent Diagnostic Testing Facility (IDTF) | 6 |
| Pulmonary disease | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 5 |
| Pharmacy | 5 |
| Clinical Laboratory (Billing Independently) | 4 |
| Neurosurgery | 4 |
| Marriage and Family Therapist | 4 |
| Occupational therapist (private practice) | 3 |
| Hospitalist | 3 |
| Allergy/immunology | 3 |
| Pain Management | 3 |
| Hematology/oncology | 3 |
| Radiation oncology | 3 |
| Infectious disease | 3 |
| Registered Dietician/Nutrition Professional | 2 |
| General practice | 2 |
| Speech / language pathology | 2 |
| Critical care (intensivists) | 2 |
| Interventional radiology | 2 |
| Neuropsychiatry | 1 |
| Certified nurse midwife | 1 |
| Vascular surgery | 1 |
| Psychologist (billing independently) | 1 |
| Anesthesiologist Assistant | 1 |
| Sleep Medicine | 1 |
| Certified clinical nurse specialist | 1 |
| Epileptologists | 1 |
| Hematology | 1 |
| Cardiac Electrophysiology | 1 |