| Physician assistant | 176 |
| Nurse practitioner | 103 |
| Family practice | 73 |
| Licensed clinical social worker | 70 |
| Certified Registered Nurse Anesthetist (CRNA) | 53 |
| Physical therapist (private practice) | 37 |
| Emergency medicine | 35 |
| Internal medicine | 33 |
| Mental Health Counselors | 29 |
| Anesthesiology | 27 |
| Chiropractic | 27 |
| Psychiatry | 19 |
| Obstetrics/gynecology | 19 |
| Hospitalist | 17 |
| Diagnostic Radiology | 17 |
| Orthopedic surgery | 16 |
| Mass Immunization Roster Billers | 14 |
| Optometrist | 14 |
| Clinical psychologist | 12 |
| Cardiology | 10 |
| General surgery | 10 |
| Gastroenterology | 9 |
| Physical medicine and rehabilitation | 9 |
| Osteopathic manipulative therapy | 8 |
| Ophthalmology | 8 |
| Audiologist (billing independently) | 7 |
| Urology | 7 |
| Occupational therapist (private practice) | 7 |
| Centralized Flu | 7 |
| Podiatry | 7 |
| Pathology | 6 |
| Pulmonary disease | 6 |
| Nephrology | 6 |
| Hematology/oncology | 5 |
| Thoracic surgery | 5 |
| Neurology | 5 |
| Pediatric medicine | 4 |
| Neurosurgery | 4 |
| General practice | 4 |
| Otolaryngology | 4 |
| Certified nurse midwife | 4 |
| Plastic and reconstructive surgery | 4 |
| Dermatology | 4 |
| Ambulatory Surgical Center | 3 |
| Vascular surgery | 3 |
| Radiation oncology | 3 |
| Infectious disease | 3 |
| Allergy/immunology | 2 |
| Cardiac Electrophysiology | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Opioid Treatment Program | 2 |
| Sleep Medicine | 2 |
| Medical oncology | 2 |
| Interventional radiology | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Addiction medicine | 1 |
| Geriatric medicine | 1 |
| Interventional Cardiology | 1 |
| Endocrinology | 1 |
| Sports Medicine | 1 |
| Medicare Diabetes Preventive Program | 1 |
| Hospice and Palliative Care | 1 |
| Maxillofacial surgery | 1 |
| Speech / language pathology | 1 |