| Nurse practitioner | 276 |
| Physician assistant | 128 |
| Licensed clinical social worker | 92 |
| Family practice | 89 |
| Internal medicine | 68 |
| Physical therapist (private practice) | 45 |
| Certified Registered Nurse Anesthetist (CRNA) | 43 |
| Hospitalist | 36 |
| Emergency medicine | 32 |
| Anesthesiology | 28 |
| Chiropractic | 25 |
| Diagnostic Radiology | 25 |
| Mass Immunization Roster Billers | 25 |
| Clinical psychologist | 24 |
| Orthopedic surgery | 24 |
| Podiatry | 22 |
| Optometrist | 22 |
| Obstetrics/gynecology | 22 |
| Cardiology | 20 |
| General surgery | 19 |
| Pathology | 17 |
| Psychiatry | 17 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 14 |
| Urology | 12 |
| Neurology | 12 |
| Gastroenterology | 9 |
| Pulmonary disease | 9 |
| Dermatology | 8 |
| Plastic and reconstructive surgery | 8 |
| Pediatric medicine | 8 |
| Mental Health Counselors | 6 |
| Hematology/oncology | 6 |
| Ophthalmology | 6 |
| Otolaryngology | 6 |
| Endocrinology | 6 |
| Rheumatology | 5 |
| Registered Dietician/Nutrition Professional | 5 |
| Neurosurgery | 5 |
| Infectious disease | 4 |
| Critical care (intensivists) | 4 |
| Radiation oncology | 4 |
| Occupational therapist (private practice) | 3 |
| Vascular surgery | 3 |
| Nephrology | 3 |
| Allergy/immunology | 3 |
| Sports Medicine | 2 |
| Centralized Flu | 2 |
| Physical medicine and rehabilitation | 2 |
| Maxillofacial surgery | 2 |
| Geriatric medicine | 2 |
| Psychologist (billing independently) | 2 |
| Cardiac Electrophysiology | 2 |
| Thoracic surgery | 2 |
| Pain Management | 1 |
| Speech / language pathology | 1 |
| Preventive medicine | 1 |
| Pharmacy | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Oral surgery (dentists only) | 1 |
| Certified nurse midwife | 1 |
| Ambulatory Surgical Center | 1 |
| Marriage and Family Therapist | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Audiologist (billing independently) | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Sleep Medicine | 1 |
| Opioid Treatment Program | 1 |