| Nurse practitioner | 223 |
| Physician assistant | 93 |
| Family practice | 81 |
| Certified Registered Nurse Anesthetist (CRNA) | 69 |
| Internal medicine | 67 |
| Emergency medicine | 45 |
| Mass Immunization Roster Billers | 32 |
| Physical therapist (private practice) | 32 |
| Chiropractic | 28 |
| Obstetrics/gynecology | 25 |
| Psychiatry | 24 |
| Diagnostic Radiology | 22 |
| Orthopedic surgery | 21 |
| Anesthesiology | 20 |
| Optometrist | 20 |
| General surgery | 19 |
| Licensed clinical social worker | 19 |
| Pediatric medicine | 11 |
| Hospitalist | 9 |
| Speech / language pathology | 8 |
| Urology | 8 |
| Gastroenterology | 8 |
| Cardiology | 8 |
| Ophthalmology | 8 |
| Occupational therapist (private practice) | 7 |
| Physical medicine and rehabilitation | 7 |
| Interventional Cardiology | 6 |
| Audiologist (billing independently) | 6 |
| Dermatology | 6 |
| Marriage and Family Therapist | 5 |
| Hematology/oncology | 5 |
| Neurology | 5 |
| Pathology | 5 |
| Centralized Flu | 5 |
| Otolaryngology | 5 |
| Mental Health Counselors | 5 |
| Nephrology | 5 |
| Critical care (intensivists) | 5 |
| Podiatry | 5 |
| Infectious disease | 4 |
| Neurosurgery | 4 |
| Pulmonary disease | 3 |
| Clinical psychologist | 3 |
| Pharmacy | 3 |
| Endocrinology | 3 |
| Rheumatology | 3 |
| Ambulatory Surgical Center | 3 |
| Medical oncology | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Cardiac Electrophysiology | 2 |
| General practice | 2 |
| Radiation oncology | 2 |
| Allergy/immunology | 2 |
| Pain Management | 2 |
| Opioid Treatment Program | 2 |
| Vascular surgery | 2 |
| Medicare Diabetes Preventive Program | 1 |
| Certified nurse midwife | 1 |
| Sports Medicine | 1 |
| Addiction medicine | 1 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Surgical oncology | 1 |
| Certified clinical nurse specialist | 1 |
| Plastic and reconstructive surgery | 1 |
| Osteopathic manipulative therapy | 1 |
| Interventional radiology | 1 |
| Hematology | 1 |