| Nurse practitioner | 246 |
| Physician assistant | 189 |
| Physical therapist (private practice) | 114 |
| Chiropractic | 79 |
| Family practice | 79 |
| Mental Health Counselors | 69 |
| Certified Registered Nurse Anesthetist (CRNA) | 52 |
| Hospitalist | 40 |
| Licensed clinical social worker | 38 |
| Clinical psychologist | 37 |
| Optometrist | 32 |
| Diagnostic Radiology | 30 |
| Internal medicine | 30 |
| Anesthesiology | 25 |
| Emergency medicine | 25 |
| Obstetrics/gynecology | 22 |
| Occupational therapist (private practice) | 20 |
| Mass Immunization Roster Billers | 19 |
| Orthopedic surgery | 19 |
| Ophthalmology | 17 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 13 |
| General surgery | 13 |
| Speech / language pathology | 13 |
| Podiatry | 12 |
| Pulmonary disease | 12 |
| Pathology | 12 |
| Ambulatory Surgical Center | 10 |
| Audiologist (billing independently) | 10 |
| Gastroenterology | 10 |
| Psychiatry | 10 |
| Interventional Cardiology | 8 |
| Neurology | 8 |
| Cardiology | 8 |
| Centralized Flu | 8 |
| Dermatology | 7 |
| Physical medicine and rehabilitation | 6 |
| Hematology/oncology | 6 |
| Nephrology | 6 |
| Urology | 6 |
| Registered Dietician/Nutrition Professional | 6 |
| Cardiac Electrophysiology | 5 |
| Pediatric medicine | 5 |
| Neurosurgery | 5 |
| Plastic and reconstructive surgery | 5 |
| Otolaryngology | 5 |
| Infectious disease | 5 |
| Vascular surgery | 4 |
| Thoracic surgery | 4 |
| Clinical Laboratory (Billing Independently) | 4 |
| Rheumatology | 3 |
| Allergy/immunology | 3 |
| Interventional radiology | 3 |
| Pain Management | 3 |
| Radiation oncology | 3 |
| Endocrinology | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Certified nurse midwife | 2 |
| Oral surgery (dentists only) | 2 |
| Hospice and Palliative Care | 1 |
| Hand surgery | 1 |
| Opioid Treatment Program | 1 |
| Interventional Pain Management (IPM) | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Medical Genetics and Genomics | 1 |
| Hematology | 1 |
| Sports Medicine | 1 |
| Surgical oncology | 1 |
| Medical oncology | 1 |