| Nurse practitioner | 161 |
| Physician assistant | 96 |
| Family practice | 51 |
| Physical therapist (private practice) | 46 |
| Licensed clinical social worker | 45 |
| Chiropractic | 43 |
| Internal medicine | 34 |
| Mental Health Counselors | 34 |
| Anesthesiology | 28 |
| Emergency medicine | 28 |
| Hospitalist | 28 |
| Clinical psychologist | 18 |
| Optometrist | 16 |
| Orthopedic surgery | 14 |
| General surgery | 13 |
| Obstetrics/gynecology | 13 |
| Psychiatry | 11 |
| Dermatology | 11 |
| Cardiology | 11 |
| Hematology/oncology | 11 |
| Ophthalmology | 10 |
| Diagnostic Radiology | 10 |
| Pediatric medicine | 10 |
| Mass Immunization Roster Billers | 9 |
| Pathology | 8 |
| Pulmonary disease | 7 |
| Interventional Cardiology | 7 |
| Neurology | 7 |
| Urology | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 5 |
| Podiatry | 5 |
| Certified nurse midwife | 5 |
| Nephrology | 5 |
| Physical medicine and rehabilitation | 5 |
| Ambulatory Surgical Center | 5 |
| Rheumatology | 4 |
| Neurosurgery | 4 |
| Registered Dietician/Nutrition Professional | 4 |
| Vascular surgery | 4 |
| Otolaryngology | 4 |
| Gastroenterology | 4 |
| Sports Medicine | 4 |
| Occupational therapist (private practice) | 4 |
| Marriage and Family Therapist | 4 |
| Audiologist (billing independently) | 3 |
| Unknown Provider | 3 |
| Cardiac Electrophysiology | 3 |
| Plastic and reconstructive surgery | 3 |
| Osteopathic manipulative therapy | 3 |
| Interventional Pain Management (IPM) | 3 |
| Centralized Flu | 3 |
| Allergy/immunology | 3 |
| Pain Management | 2 |
| Interventional radiology | 2 |
| Infectious disease | 2 |
| Critical care (intensivists) | 2 |
| Hand surgery | 2 |
| Speech / language pathology | 2 |
| Endocrinology | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Radiation oncology | 2 |
| Pharmacy | 2 |
| Sleep Medicine | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Surgical oncology | 1 |
| Hospice and Palliative Care | 1 |
| Psychologist (billing independently) | 1 |
| Opioid Treatment Program | 1 |
| Maxillofacial surgery | 1 |
| General practice | 1 |
| Slide Preparation Facilities | 1 |
| Hematology | 1 |