| Nurse practitioner | 168 |
| Physician assistant | 124 |
| Internal medicine | 105 |
| Anesthesiologist Assistant | 61 |
| Physical therapist (private practice) | 57 |
| Family practice | 53 |
| Certified Registered Nurse Anesthetist (CRNA) | 43 |
| Emergency medicine | 42 |
| Anesthesiology | 37 |
| Psychiatry | 32 |
| Licensed clinical social worker | 28 |
| Optometrist | 27 |
| Diagnostic Radiology | 26 |
| Mass Immunization Roster Billers | 25 |
| Obstetrics/gynecology | 25 |
| Orthopedic surgery | 24 |
| Chiropractic | 23 |
| General surgery | 20 |
| Mental Health Counselors | 20 |
| Occupational therapist (private practice) | 16 |
| Cardiology | 16 |
| Ophthalmology | 15 |
| Centralized Flu | 12 |
| Gastroenterology | 11 |
| Podiatry | 11 |
| Neurology | 11 |
| Pulmonary disease | 10 |
| Plastic and reconstructive surgery | 10 |
| Ambulatory Surgical Center | 9 |
| Pathology | 9 |
| Hospitalist | 9 |
| Hematology/oncology | 9 |
| Nephrology | 8 |
| Neurosurgery | 8 |
| Clinical psychologist | 8 |
| Speech / language pathology | 7 |
| Urology | 7 |
| Audiologist (billing independently) | 7 |
| Pharmacy | 6 |
| Dermatology | 5 |
| Registered Dietician/Nutrition Professional | 5 |
| Critical care (intensivists) | 5 |
| Physical medicine and rehabilitation | 5 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Pediatric medicine | 4 |
| Allergy/immunology | 4 |
| Otolaryngology | 4 |
| Thoracic surgery | 3 |
| Interventional radiology | 3 |
| Surgical oncology | 3 |
| Vascular surgery | 3 |
| Rheumatology | 3 |
| Clinical Laboratory (Billing Independently) | 2 |
| Interventional Pain Management (IPM) | 2 |
| Infectious disease | 2 |
| Marriage and Family Therapist | 2 |
| Endocrinology | 2 |
| Interventional Cardiology | 2 |
| Pain Management | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Unknown Provider | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Psychologist (billing independently) | 1 |
| Addiction medicine | 1 |
| Hospice and Palliative Care | 1 |
| Hand surgery | 1 |
| Opioid Treatment Program | 1 |
| Geriatric medicine | 1 |
| Radiation oncology | 1 |
| Certified clinical nurse specialist | 1 |
| Gynecologist/oncologist | 1 |