| Family practice | 87 |
| Physician assistant | 79 |
| Nurse practitioner | 63 |
| Physical therapist (private practice) | 55 |
| Internal medicine | 38 |
| Chiropractic | 36 |
| Licensed clinical social worker | 32 |
| Marriage and Family Therapist | 31 |
| Anesthesiology | 30 |
| Clinical psychologist | 26 |
| Emergency medicine | 23 |
| Optometrist | 22 |
| Pediatric medicine | 21 |
| Hospitalist | 20 |
| Psychiatry | 20 |
| Diagnostic Radiology | 16 |
| Obstetrics/gynecology | 15 |
| Mass Immunization Roster Billers | 15 |
| Podiatry | 12 |
| Ophthalmology | 11 |
| General surgery | 11 |
| Urology | 10 |
| Orthopedic surgery | 9 |
| Certified nurse midwife | 9 |
| Endocrinology | 8 |
| Gastroenterology | 8 |
| Otolaryngology | 7 |
| General practice | 7 |
| Hematology/oncology | 6 |
| Registered Dietician/Nutrition Professional | 6 |
| Neurology | 6 |
| Occupational therapist (private practice) | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 5 |
| Dermatology | 5 |
| Audiologist (billing independently) | 5 |
| Rheumatology | 4 |
| Sleep Medicine | 4 |
| Infectious disease | 4 |
| Neurosurgery | 4 |
| Psychologist (billing independently) | 3 |
| Cardiology | 3 |
| Interventional Pain Management (IPM) | 3 |
| Osteopathic manipulative therapy | 3 |
| Allergy/immunology | 3 |
| Pathology | 3 |
| Pulmonary disease | 3 |
| Centralized Flu | 2 |
| Plastic and reconstructive surgery | 2 |
| Nephrology | 2 |
| Physical medicine and rehabilitation | 2 |
| Pain Management | 2 |
| Speech / language pathology | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Medical oncology | 2 |
| Pharmacy | 2 |
| Thoracic surgery | 2 |
| Interventional Cardiology | 2 |
| Oral surgery (dentists only) | 2 |
| Preventive medicine | 2 |
| Radiation oncology | 1 |
| Maxillofacial surgery | 1 |
| Vascular surgery | 1 |
| Cardiac surgery | 1 |
| Nuclear medicine | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Hematology | 1 |
| Sports Medicine | 1 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 1 |
| Ambulatory Surgical Center | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Hand surgery | 1 |
| Opioid Treatment Program | 1 |