| Nurse practitioner | 164 |
| Physical therapist (private practice) | 76 |
| Anesthesiology | 68 |
| Physician assistant | 67 |
| Chiropractic | 65 |
| Family practice | 61 |
| Emergency medicine | 46 |
| Licensed clinical social worker | 30 |
| Optometrist | 27 |
| Internal medicine | 27 |
| Diagnostic Radiology | 24 |
| Mass Immunization Roster Billers | 20 |
| Obstetrics/gynecology | 19 |
| Mental Health Counselors | 18 |
| Psychiatry | 16 |
| Orthopedic surgery | 15 |
| Ophthalmology | 13 |
| Clinical psychologist | 13 |
| Gastroenterology | 11 |
| Cardiology | 11 |
| Marriage and Family Therapist | 11 |
| General surgery | 10 |
| Occupational therapist (private practice) | 10 |
| Podiatry | 10 |
| Speech / language pathology | 10 |
| Neurology | 9 |
| Otolaryngology | 9 |
| Pathology | 9 |
| Nephrology | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 8 |
| Dermatology | 8 |
| Neurosurgery | 7 |
| Hospitalist | 6 |
| Urology | 6 |
| Pulmonary disease | 5 |
| Physical medicine and rehabilitation | 5 |
| Certified Registered Nurse Anesthetist (CRNA) | 4 |
| Rheumatology | 4 |
| Interventional Cardiology | 4 |
| Oral surgery (dentists only) | 4 |
| Centralized Flu | 4 |
| Registered Dietician/Nutrition Professional | 3 |
| Pediatric medicine | 3 |
| Endocrinology | 3 |
| Critical care (intensivists) | 3 |
| Pharmacy | 2 |
| Maxillofacial surgery | 2 |
| Ambulatory Surgical Center | 2 |
| Radiation oncology | 2 |
| Infectious disease | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Hematology/oncology | 2 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 2 |
| Hand surgery | 2 |
| Medical oncology | 2 |
| Certified nurse midwife | 2 |
| Vascular surgery | 1 |
| Thoracic surgery | 1 |
| Unknown Provider | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Surgical oncology | 1 |
| Allergy/immunology | 1 |
| Cardiac Electrophysiology | 1 |
| Audiologist (billing independently) | 1 |
| Preventive medicine | 1 |
| Cardiac surgery | 1 |
| Hospice and Palliative Care | 1 |
| Plastic and reconstructive surgery | 1 |