| Nurse practitioner | 157 |
| Physician assistant | 133 |
| Certified Registered Nurse Anesthetist (CRNA) | 64 |
| Physical therapist (private practice) | 53 |
| Emergency medicine | 39 |
| Internal medicine | 36 |
| Licensed clinical social worker | 35 |
| Hospitalist | 31 |
| Family practice | 30 |
| Anesthesiology | 21 |
| Optometrist | 18 |
| Obstetrics/gynecology | 15 |
| Diagnostic Radiology | 14 |
| Psychiatry | 13 |
| Mass Immunization Roster Billers | 13 |
| Mental Health Counselors | 13 |
| Ophthalmology | 11 |
| Orthopedic surgery | 11 |
| Neurology | 10 |
| Podiatry | 9 |
| Pathology | 9 |
| General surgery | 9 |
| Chiropractic | 9 |
| Gastroenterology | 8 |
| Cardiology | 8 |
| Dermatology | 7 |
| Otolaryngology | 7 |
| Clinical psychologist | 7 |
| Urology | 7 |
| Hematology/oncology | 6 |
| Vascular surgery | 5 |
| Audiologist (billing independently) | 5 |
| Nephrology | 5 |
| Speech / language pathology | 4 |
| Infectious disease | 4 |
| Interventional Cardiology | 4 |
| Critical care (intensivists) | 4 |
| Neurosurgery | 4 |
| Ambulatory Surgical Center | 3 |
| Radiation oncology | 3 |
| Pulmonary disease | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Endocrinology | 3 |
| Centralized Flu | 3 |
| Cardiac Electrophysiology | 3 |
| Interventional Pain Management (IPM) | 2 |
| Rheumatology | 2 |
| Cardiac surgery | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Pharmacy | 2 |
| Opioid Treatment Program | 2 |
| Allergy/immunology | 2 |
| Thoracic surgery | 1 |
| Maxillofacial surgery | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Certified nurse midwife | 1 |
| Marriage and Family Therapist | 1 |
| Pain Management | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Certified clinical nurse specialist | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Oral surgery (dentists only) | 1 |
| Gynecologist/oncologist | 1 |
| Medical oncology | 1 |
| Occupational therapist (private practice) | 1 |
| Pediatric medicine | 1 |
| Interventional radiology | 1 |