| Nurse practitioner | 299 |
| Physician assistant | 125 |
| Family practice | 101 |
| Internal medicine | 96 |
| Certified Registered Nurse Anesthetist (CRNA) | 91 |
| Physical therapist (private practice) | 62 |
| Emergency medicine | 58 |
| Licensed clinical social worker | 45 |
| Chiropractic | 44 |
| Anesthesiology | 37 |
| Mental Health Counselors | 32 |
| General surgery | 32 |
| Mass Immunization Roster Billers | 31 |
| Optometrist | 30 |
| Orthopedic surgery | 27 |
| Diagnostic Radiology | 26 |
| Obstetrics/gynecology | 25 |
| Occupational therapist (private practice) | 20 |
| Ophthalmology | 17 |
| Hematology/oncology | 15 |
| Cardiology | 15 |
| Neurology | 14 |
| Gastroenterology | 14 |
| Pulmonary disease | 13 |
| Otolaryngology | 12 |
| Centralized Flu | 12 |
| Urology | 11 |
| Rheumatology | 11 |
| Dermatology | 11 |
| Psychiatry | 11 |
| Podiatry | 10 |
| Physical medicine and rehabilitation | 10 |
| Anesthesiologist Assistant | 9 |
| Endocrinology | 8 |
| Ambulatory Surgical Center | 8 |
| Independent Diagnostic Testing Facility (IDTF) | 8 |
| Pediatric medicine | 8 |
| Vascular surgery | 8 |
| Speech / language pathology | 7 |
| Audiologist (billing independently) | 6 |
| Allergy/immunology | 6 |
| Clinical psychologist | 6 |
| Clinical Laboratory (Billing Independently) | 5 |
| Pathology | 5 |
| Plastic and reconstructive surgery | 5 |
| Infectious disease | 5 |
| Sports Medicine | 4 |
| Neurosurgery | 4 |
| Certified nurse midwife | 4 |
| Radiation oncology | 4 |
| Gynecologist/oncologist | 3 |
| Cardiac Electrophysiology | 3 |
| Interventional Cardiology | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Pharmacy | 3 |
| Interventional Pain Management (IPM) | 2 |
| Cardiac surgery | 2 |
| Hand surgery | 2 |
| Nephrology | 2 |
| Hospitalist | 2 |
| Medical oncology | 2 |
| Pain Management | 2 |
| General practice | 2 |
| Critical care (intensivists) | 2 |
| Surgical oncology | 1 |
| Hematology | 1 |
| Psychologist (billing independently) | 1 |
| Dentist | 1 |
| Hospice and Palliative Care | 1 |
| Interventional radiology | 1 |
| Marriage and Family Therapist | 1 |
| Maxillofacial surgery | 1 |