| Nurse practitioner | 207 |
| Physician assistant | 108 |
| Internal medicine | 96 |
| Family practice | 66 |
| Certified Registered Nurse Anesthetist (CRNA) | 58 |
| Emergency medicine | 51 |
| Anesthesiology | 43 |
| Licensed clinical social worker | 31 |
| Diagnostic Radiology | 28 |
| Mental Health Counselors | 28 |
| General surgery | 24 |
| Obstetrics/gynecology | 23 |
| Chiropractic | 21 |
| Psychiatry | 21 |
| Neurology | 19 |
| Mass Immunization Roster Billers | 19 |
| Optometrist | 18 |
| Orthopedic surgery | 18 |
| Clinical psychologist | 17 |
| Pathology | 14 |
| Gastroenterology | 13 |
| Pulmonary disease | 13 |
| Ophthalmology | 13 |
| Cardiology | 10 |
| Otolaryngology | 9 |
| Physical medicine and rehabilitation | 9 |
| Nephrology | 9 |
| Pediatric medicine | 9 |
| Podiatry | 9 |
| Urology | 9 |
| Dermatology | 8 |
| Physical therapist (private practice) | 8 |
| Pharmacy | 7 |
| Audiologist (billing independently) | 7 |
| Pain Management | 6 |
| Vascular surgery | 5 |
| Neurosurgery | 5 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 5 |
| Interventional Cardiology | 5 |
| Thoracic surgery | 5 |
| Registered Dietician/Nutrition Professional | 4 |
| Centralized Flu | 4 |
| Marriage and Family Therapist | 4 |
| Plastic and reconstructive surgery | 4 |
| Radiation oncology | 4 |
| Interventional radiology | 4 |
| Hospitalist | 4 |
| Medical oncology | 4 |
| Cardiac Electrophysiology | 3 |
| Infectious disease | 3 |
| Rheumatology | 3 |
| Ambulatory Surgical Center | 2 |
| General practice | 2 |
| Allergy/immunology | 2 |
| Certified clinical nurse specialist | 2 |
| Dentist | 2 |
| Endocrinology | 2 |
| Interventional Pain Management (IPM) | 2 |
| Occupational therapist (private practice) | 2 |
| Hematology/oncology | 2 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Psychologist (billing independently) | 1 |
| Hospice and Palliative Care | 1 |
| Opioid Treatment Program | 1 |
| Geriatric medicine | 1 |
| Hematology | 1 |
| Anesthesiologist Assistant | 1 |
| Critical care (intensivists) | 1 |
| Colorectal surgery (formerly proctology) | 1 |