| Nurse practitioner | 187 |
| Physician assistant | 64 |
| Family practice | 64 |
| Certified Registered Nurse Anesthetist (CRNA) | 63 |
| Internal medicine | 46 |
| Emergency medicine | 21 |
| Mass Immunization Roster Billers | 17 |
| Chiropractic | 17 |
| Obstetrics/gynecology | 17 |
| Physical therapist (private practice) | 16 |
| Diagnostic Radiology | 15 |
| Urology | 13 |
| Optometrist | 12 |
| Mental Health Counselors | 12 |
| Anesthesiology | 12 |
| General surgery | 11 |
| Hospitalist | 11 |
| Cardiology | 10 |
| Psychiatry | 10 |
| Gastroenterology | 10 |
| Ophthalmology | 10 |
| Orthopedic surgery | 10 |
| Pulmonary disease | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 9 |
| Critical care (intensivists) | 7 |
| Podiatry | 7 |
| Clinical psychologist | 7 |
| Neurosurgery | 6 |
| Neurology | 6 |
| Endocrinology | 5 |
| Otolaryngology | 5 |
| Pharmacy | 5 |
| Hematology/oncology | 5 |
| Radiation oncology | 5 |
| Centralized Flu | 5 |
| Vascular surgery | 4 |
| Thoracic surgery | 4 |
| Licensed clinical social worker | 4 |
| Interventional Cardiology | 4 |
| Physical medicine and rehabilitation | 4 |
| Pediatric medicine | 3 |
| Pathology | 3 |
| Occupational therapist (private practice) | 3 |
| Sports Medicine | 3 |
| Dermatology | 3 |
| Speech / language pathology | 2 |
| Interventional radiology | 2 |
| Rheumatology | 2 |
| Nephrology | 2 |
| Neuropsychiatry | 2 |
| Plastic and reconstructive surgery | 2 |
| Pain Management | 2 |
| Infectious disease | 2 |
| Audiologist (billing independently) | 2 |
| Sleep Medicine | 1 |
| Cardiac Electrophysiology | 1 |
| Hand surgery | 1 |
| Gynecologist/oncologist | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| General Psychiatry | 1 |
| Hospice and Palliative Care | 1 |
| General practice | 1 |
| Osteopathic manipulative therapy | 1 |
| Certified nurse midwife | 1 |
| Marriage and Family Therapist | 1 |
| Opioid Treatment Program | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Ambulatory Surgical Center | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Medical oncology | 1 |