| Nurse practitioner | 357 |
| Physician assistant | 339 |
| Family practice | 140 |
| Internal medicine | 134 |
| Certified Registered Nurse Anesthetist (CRNA) | 129 |
| Physical therapist (private practice) | 96 |
| Licensed clinical social worker | 77 |
| Emergency medicine | 62 |
| Obstetrics/gynecology | 57 |
| Diagnostic Radiology | 55 |
| Mental Health Counselors | 45 |
| Mass Immunization Roster Billers | 45 |
| Anesthesiology | 42 |
| Optometrist | 37 |
| Chiropractic | 34 |
| Cardiology | 34 |
| Orthopedic surgery | 33 |
| Hospitalist | 31 |
| General surgery | 31 |
| Ophthalmology | 31 |
| Psychiatry | 28 |
| Neurology | 28 |
| Clinical psychologist | 24 |
| Occupational therapist (private practice) | 22 |
| Gastroenterology | 18 |
| Dermatology | 17 |
| Nephrology | 17 |
| Centralized Flu | 17 |
| Audiologist (billing independently) | 16 |
| Pulmonary disease | 16 |
| Urology | 16 |
| Hematology/oncology | 15 |
| Podiatry | 15 |
| Otolaryngology | 15 |
| Physical medicine and rehabilitation | 13 |
| Certified nurse midwife | 12 |
| Neurosurgery | 11 |
| Allergy/immunology | 11 |
| Sports Medicine | 11 |
| Speech / language pathology | 10 |
| Infectious disease | 10 |
| Pharmacy | 9 |
| Pathology | 9 |
| Rheumatology | 8 |
| Interventional Cardiology | 8 |
| Ambulatory Surgical Center | 8 |
| Radiation oncology | 8 |
| Plastic and reconstructive surgery | 8 |
| Critical care (intensivists) | 7 |
| Endocrinology | 6 |
| Marriage and Family Therapist | 6 |
| Cardiac Electrophysiology | 5 |
| Pediatric medicine | 5 |
| Registered Dietician/Nutrition Professional | 5 |
| Clinical Laboratory (Billing Independently) | 4 |
| Vascular surgery | 4 |
| Oral surgery (dentists only) | 4 |
| Medical oncology | 3 |
| Interventional Pain Management (IPM) | 3 |
| Opioid Treatment Program | 3 |
| Advanced Heart Failure and Transplant Cardiology | 3 |
| General practice | 3 |
| Hand surgery | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Thoracic surgery | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Cardiac surgery | 2 |
| Peripheral vascular disease | 2 |
| Hospice and Palliative Care | 2 |
| Geriatric medicine | 2 |
| Pain Management | 2 |
| Neuropsychiatry | 1 |
| Unknown Provider | 1 |
| Certified clinical nurse specialist | 1 |
| Medical Genetics and Genomics | 1 |
| Hematology | 1 |
| Surgical oncology | 1 |
| Addiction medicine | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Sleep Medicine | 1 |
| Preventive medicine | 1 |