| Physician assistant | 132 |
| Nurse practitioner | 102 |
| Family practice | 64 |
| Anesthesiology | 49 |
| Licensed clinical social worker | 45 |
| Physical therapist (private practice) | 43 |
| Internal medicine | 35 |
| Mental Health Counselors | 33 |
| Optometrist | 28 |
| Emergency medicine | 25 |
| Chiropractic | 23 |
| Diagnostic Radiology | 19 |
| Hospitalist | 17 |
| Certified Registered Nurse Anesthetist (CRNA) | 17 |
| Orthopedic surgery | 14 |
| General surgery | 14 |
| Cardiology | 14 |
| Neurology | 13 |
| Obstetrics/gynecology | 12 |
| Psychiatry | 12 |
| Pulmonary disease | 12 |
| Dermatology | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 9 |
| Ophthalmology | 8 |
| Neurosurgery | 7 |
| Podiatry | 7 |
| Hematology/oncology | 7 |
| Occupational therapist (private practice) | 7 |
| Mass Immunization Roster Billers | 6 |
| Gastroenterology | 6 |
| Nephrology | 6 |
| Pathology | 6 |
| Urology | 6 |
| Clinical psychologist | 6 |
| Gynecologist/oncologist | 5 |
| Audiologist (billing independently) | 5 |
| Otolaryngology | 5 |
| General practice | 4 |
| Pediatric medicine | 4 |
| Rheumatology | 4 |
| Centralized Flu | 4 |
| Sleep Medicine | 3 |
| Allergy/immunology | 3 |
| Thoracic surgery | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Infectious disease | 3 |
| Vascular surgery | 3 |
| Radiation oncology | 3 |
| Ambulatory Surgical Center | 3 |
| Interventional Cardiology | 3 |
| Critical care (intensivists) | 2 |
| Physical medicine and rehabilitation | 2 |
| Cardiac Electrophysiology | 2 |
| Oral surgery (dentists only) | 2 |
| Hospice and Palliative Care | 2 |
| Geriatric medicine | 2 |
| Pharmacy | 1 |
| Plastic and reconstructive surgery | 1 |
| Unknown Provider | 1 |
| Cardiac surgery | 1 |
| Psychologist (billing independently) | 1 |
| Speech / language pathology | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Endocrinology | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Interventional radiology | 1 |
| Opioid Treatment Program | 1 |
| Marriage and Family Therapist | 1 |