| Family practice | 144 |
| Physician assistant | 135 |
| Nurse practitioner | 99 |
| Physical therapist (private practice) | 77 |
| Licensed clinical social worker | 56 |
| Internal medicine | 56 |
| Anesthesiology | 52 |
| Chiropractic | 45 |
| Marriage and Family Therapist | 44 |
| Emergency medicine | 44 |
| Pediatric medicine | 36 |
| Hospitalist | 34 |
| Obstetrics/gynecology | 31 |
| Clinical psychologist | 31 |
| Optometrist | 30 |
| Psychiatry | 29 |
| Diagnostic Radiology | 20 |
| Mass Immunization Roster Billers | 17 |
| Podiatry | 17 |
| Ophthalmology | 16 |
| Gastroenterology | 15 |
| Orthopedic surgery | 14 |
| Occupational therapist (private practice) | 14 |
| Certified nurse midwife | 13 |
| General surgery | 13 |
| Urology | 13 |
| Dermatology | 11 |
| Endocrinology | 11 |
| Hematology/oncology | 11 |
| Registered Dietician/Nutrition Professional | 11 |
| Otolaryngology | 10 |
| Cardiology | 10 |
| Pulmonary disease | 10 |
| General practice | 8 |
| Nephrology | 8 |
| Physical medicine and rehabilitation | 8 |
| Neurology | 8 |
| Audiologist (billing independently) | 8 |
| Neurosurgery | 8 |
| Certified Registered Nurse Anesthetist (CRNA) | 7 |
| Rheumatology | 7 |
| Plastic and reconstructive surgery | 7 |
| Osteopathic manipulative therapy | 7 |
| Pathology | 6 |
| Sleep Medicine | 5 |
| Infectious disease | 5 |
| Psychologist (billing independently) | 4 |
| Centralized Flu | 4 |
| Allergy/immunology | 4 |
| Radiation oncology | 3 |
| Clinical Laboratory (Billing Independently) | 3 |
| Interventional Pain Management (IPM) | 3 |
| Pharmacy | 3 |
| Ambulatory Surgical Center | 3 |
| Vascular surgery | 2 |
| Pain Management | 2 |
| Speech / language pathology | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Medical oncology | 2 |
| Sports Medicine | 2 |
| Thoracic surgery | 2 |
| Interventional Cardiology | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Oral surgery (dentists only) | 2 |
| Preventive medicine | 2 |
| Opioid Treatment Program | 2 |
| Unknown physician specialty | 2 |
| Hospice and Palliative Care | 2 |
| Geriatric medicine | 2 |
| Maxillofacial surgery | 1 |
| Cardiac surgery | 1 |
| Nuclear medicine | 1 |
| Hematology | 1 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 1 |
| Hand surgery | 1 |
| Critical care (intensivists) | 1 |
| Unknown Provider | 1 |
| Dentist | 1 |