| Nurse practitioner | 194 |
| Physician assistant | 89 |
| Licensed clinical social worker | 62 |
| Family practice | 62 |
| Internal medicine | 43 |
| Physical therapist (private practice) | 26 |
| Certified Registered Nurse Anesthetist (CRNA) | 26 |
| Hospitalist | 23 |
| Emergency medicine | 22 |
| Clinical psychologist | 19 |
| Anesthesiology | 18 |
| Mass Immunization Roster Billers | 18 |
| Chiropractic | 17 |
| Podiatry | 16 |
| Diagnostic Radiology | 16 |
| Cardiology | 13 |
| Orthopedic surgery | 13 |
| General surgery | 12 |
| Pathology | 12 |
| Optometrist | 11 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 11 |
| Urology | 10 |
| Obstetrics/gynecology | 10 |
| Psychiatry | 8 |
| Neurology | 8 |
| Pediatric medicine | 7 |
| Gastroenterology | 6 |
| Registered Dietician/Nutrition Professional | 5 |
| Endocrinology | 5 |
| Pulmonary disease | 5 |
| Rheumatology | 4 |
| Mental Health Counselors | 4 |
| Hematology/oncology | 4 |
| Ophthalmology | 4 |
| Dermatology | 4 |
| Plastic and reconstructive surgery | 4 |
| Neurosurgery | 4 |
| Occupational therapist (private practice) | 3 |
| Nephrology | 3 |
| Sports Medicine | 2 |
| Centralized Flu | 2 |
| Otolaryngology | 2 |
| Speech / language pathology | 2 |
| Vascular surgery | 2 |
| Maxillofacial surgery | 2 |
| Critical care (intensivists) | 2 |
| Cardiac Electrophysiology | 2 |
| Pain Management | 1 |
| Physical medicine and rehabilitation | 1 |
| Infectious disease | 1 |
| Preventive medicine | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Pharmacy | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Geriatric medicine | 1 |
| Psychologist (billing independently) | 1 |
| Oral surgery (dentists only) | 1 |
| Certified nurse midwife | 1 |
| Ambulatory Surgical Center | 1 |
| Marriage and Family Therapist | 1 |
| Thoracic surgery | 1 |
| Allergy/immunology | 1 |