| Nurse practitioner | 198 |
| Certified Registered Nurse Anesthetist (CRNA) | 87 |
| Internal medicine | 67 |
| Physician assistant | 55 |
| Family practice | 49 |
| Physical therapist (private practice) | 41 |
| Emergency medicine | 36 |
| Anesthesiology | 34 |
| Diagnostic Radiology | 33 |
| Obstetrics/gynecology | 24 |
| Chiropractic | 24 |
| Licensed clinical social worker | 21 |
| Hospitalist | 20 |
| Psychiatry | 20 |
| Mental Health Counselors | 19 |
| Orthopedic surgery | 18 |
| Optometrist | 17 |
| Mass Immunization Roster Billers | 13 |
| Interventional Cardiology | 12 |
| Pathology | 10 |
| Cardiology | 10 |
| Pulmonary disease | 10 |
| Dermatology | 10 |
| Gastroenterology | 10 |
| Audiologist (billing independently) | 10 |
| Critical care (intensivists) | 10 |
| Neurology | 9 |
| General surgery | 9 |
| Occupational therapist (private practice) | 9 |
| Pediatric medicine | 9 |
| Clinical psychologist | 8 |
| Ophthalmology | 8 |
| Otolaryngology | 7 |
| Centralized Flu | 7 |
| Endocrinology | 6 |
| Podiatry | 6 |
| Plastic and reconstructive surgery | 6 |
| Infectious disease | 6 |
| Urology | 5 |
| Speech / language pathology | 4 |
| Colorectal surgery (formerly proctology) | 4 |
| Allergy/immunology | 4 |
| Hematology/oncology | 4 |
| Physical medicine and rehabilitation | 4 |
| Vascular surgery | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Radiation oncology | 3 |
| Sports Medicine | 3 |
| Nephrology | 3 |
| Rheumatology | 3 |
| Neurosurgery | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Pain Management | 2 |
| Certified nurse midwife | 1 |
| Gynecologist/oncologist | 1 |
| Pharmacy | 1 |
| Hand surgery | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Hematology | 1 |
| Opioid Treatment Program | 1 |
| Thoracic surgery | 1 |
| Medical oncology | 1 |