| Nurse practitioner | 271 |
| Internal medicine | 104 |
| Family practice | 84 |
| Physician assistant | 67 |
| Certified Registered Nurse Anesthetist (CRNA) | 58 |
| Chiropractic | 55 |
| Physical therapist (private practice) | 54 |
| Emergency medicine | 47 |
| Licensed clinical social worker | 31 |
| General surgery | 31 |
| Mental Health Counselors | 31 |
| Diagnostic Radiology | 30 |
| Anesthesiology | 28 |
| Optometrist | 27 |
| Mass Immunization Roster Billers | 27 |
| Certified clinical nurse specialist | 21 |
| Clinical psychologist | 20 |
| Neurology | 19 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 18 |
| Pathology | 17 |
| Orthopedic surgery | 17 |
| Obstetrics/gynecology | 17 |
| Cardiology | 16 |
| Podiatry | 16 |
| Hospitalist | 15 |
| Psychiatry | 15 |
| Ophthalmology | 13 |
| Gastroenterology | 13 |
| Pediatric medicine | 11 |
| Pulmonary disease | 10 |
| Occupational therapist (private practice) | 10 |
| Audiologist (billing independently) | 10 |
| Nephrology | 10 |
| Centralized Flu | 10 |
| Radiation oncology | 8 |
| Urology | 7 |
| Infectious disease | 7 |
| Neurosurgery | 6 |
| Hematology/oncology | 6 |
| Critical care (intensivists) | 5 |
| Registered Dietician/Nutrition Professional | 5 |
| Certified nurse midwife | 5 |
| Vascular surgery | 5 |
| Otolaryngology | 5 |
| Speech / language pathology | 4 |
| Dermatology | 4 |
| Allergy/immunology | 4 |
| Pharmacy | 3 |
| Interventional Cardiology | 3 |
| Ambulatory Surgical Center | 3 |
| Hand surgery | 3 |
| Sports Medicine | 3 |
| Plastic and reconstructive surgery | 3 |
| Interventional radiology | 3 |
| Hospice and Palliative Care | 3 |
| Marriage and Family Therapist | 2 |
| Geriatric medicine | 2 |
| Thoracic surgery | 2 |
| Gynecologist/oncologist | 2 |
| Oral surgery (dentists only) | 2 |
| Endocrinology | 2 |
| Physical medicine and rehabilitation | 2 |
| Rheumatology | 2 |
| Cardiac Electrophysiology | 2 |
| Medical oncology | 1 |
| Nuclear medicine | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| General practice | 1 |
| Opioid Treatment Program | 1 |
| Addiction medicine | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Sleep Medicine | 1 |