| Nurse practitioner | 237 |
| Licensed clinical social worker | 169 |
| Physician assistant | 155 |
| Family practice | 114 |
| Physical therapist (private practice) | 103 |
| Internal medicine | 95 |
| Certified Registered Nurse Anesthetist (CRNA) | 63 |
| Optometrist | 55 |
| Mental Health Counselors | 51 |
| Emergency medicine | 49 |
| Clinical psychologist | 48 |
| Chiropractic | 43 |
| Anesthesiology | 40 |
| Psychiatry | 36 |
| Obstetrics/gynecology | 35 |
| Mass Immunization Roster Billers | 31 |
| Occupational therapist (private practice) | 28 |
| Diagnostic Radiology | 28 |
| Orthopedic surgery | 24 |
| General surgery | 21 |
| Hospitalist | 17 |
| Neurology | 15 |
| Podiatry | 15 |
| Physical medicine and rehabilitation | 14 |
| Cardiology | 14 |
| Pathology | 14 |
| Pediatric medicine | 13 |
| Audiologist (billing independently) | 13 |
| Osteopathic manipulative therapy | 12 |
| Hematology/oncology | 11 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 9 |
| Speech / language pathology | 8 |
| Gastroenterology | 8 |
| Otolaryngology | 8 |
| Ophthalmology | 7 |
| Neurosurgery | 7 |
| Centralized Flu | 7 |
| Pulmonary disease | 6 |
| Nephrology | 6 |
| Urology | 6 |
| Interventional radiology | 5 |
| Critical care (intensivists) | 5 |
| Maxillofacial surgery | 5 |
| Radiation oncology | 4 |
| Plastic and reconstructive surgery | 4 |
| Ambulatory Surgical Center | 4 |
| Certified nurse midwife | 4 |
| Endocrinology | 4 |
| Rheumatology | 3 |
| Infectious disease | 3 |
| General practice | 3 |
| Oral surgery (dentists only) | 3 |
| Thoracic surgery | 3 |
| Hand surgery | 3 |
| Allergy/immunology | 3 |
| Interventional Cardiology | 3 |
| Dermatology | 3 |
| Medical Genetics and Genomics | 2 |
| Marriage and Family Therapist | 2 |
| Vascular surgery | 2 |
| Certified clinical nurse specialist | 2 |
| Sports Medicine | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Pharmacy | 2 |
| Geriatric medicine | 2 |
| Surgical oncology | 2 |
| Medical oncology | 1 |
| Nuclear medicine | 1 |
| General Psychiatry | 1 |
| Psychologist (billing independently) | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Cardiac Electrophysiology | 1 |
| Opioid Treatment Program | 1 |
| Gynecologist/oncologist | 1 |