| Physical therapist (private practice) | 161 |
| Physician assistant | 152 |
| Nurse practitioner | 121 |
| Family practice | 71 |
| Licensed clinical social worker | 70 |
| Chiropractic | 53 |
| Emergency medicine | 42 |
| Internal medicine | 40 |
| Anesthesiology | 35 |
| Mental Health Counselors | 33 |
| Optometrist | 22 |
| Diagnostic Radiology | 21 |
| Obstetrics/gynecology | 17 |
| Psychiatry | 16 |
| General surgery | 16 |
| Orthopedic surgery | 15 |
| Ophthalmology | 15 |
| Clinical psychologist | 13 |
| Dermatology | 13 |
| Hospitalist | 12 |
| Registered Dietician/Nutrition Professional | 12 |
| Otolaryngology | 11 |
| Audiologist (billing independently) | 11 |
| Occupational therapist (private practice) | 10 |
| Neurology | 10 |
| Podiatry | 10 |
| Marriage and Family Therapist | 8 |
| Rheumatology | 7 |
| Cardiology | 7 |
| Speech / language pathology | 7 |
| Certified nurse midwife | 7 |
| Pathology | 7 |
| Urology | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 6 |
| Nephrology | 6 |
| Critical care (intensivists) | 5 |
| Ambulatory Surgical Center | 5 |
| Neurosurgery | 5 |
| Hematology/oncology | 5 |
| Physical medicine and rehabilitation | 5 |
| Medical oncology | 5 |
| Mass Immunization Roster Billers | 5 |
| Radiation oncology | 4 |
| Interventional Cardiology | 4 |
| Infectious disease | 4 |
| Gastroenterology | 4 |
| Plastic and reconstructive surgery | 4 |
| Pulmonary disease | 4 |
| Hospice and Palliative Care | 3 |
| Vascular surgery | 3 |
| Surgical oncology | 3 |
| Centralized Flu | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Pediatric medicine | 2 |
| Allergy/immunology | 2 |
| Endocrinology | 2 |
| Interventional radiology | 2 |
| Hand surgery | 1 |
| Thoracic surgery | 1 |
| Unknown Provider | 1 |
| Interventional Pain Management (IPM) | 1 |
| Sleep Medicine | 1 |
| Dentist | 1 |
| Gynecologist/oncologist | 1 |
| Maxillofacial surgery | 1 |
| Psychologist (billing independently) | 1 |
| Pharmacy | 1 |
| Cardiac Electrophysiology | 1 |
| Unknown physician specialty | 1 |
| Cardiac surgery | 1 |
| Sports Medicine | 1 |