| Nurse practitioner | 278 |
| Internal medicine | 131 |
| Family practice | 122 |
| Physician assistant | 108 |
| Emergency medicine | 75 |
| Physical therapist (private practice) | 60 |
| Psychiatry | 48 |
| Certified Registered Nurse Anesthetist (CRNA) | 48 |
| Obstetrics/gynecology | 44 |
| Mass Immunization Roster Billers | 41 |
| Optometrist | 37 |
| Diagnostic Radiology | 35 |
| Marriage and Family Therapist | 30 |
| General surgery | 30 |
| Chiropractic | 29 |
| Anesthesiology | 27 |
| Licensed clinical social worker | 27 |
| Cardiology | 23 |
| Orthopedic surgery | 21 |
| Ophthalmology | 18 |
| Hospitalist | 17 |
| Neurology | 17 |
| Ambulatory Surgical Center | 14 |
| Podiatry | 13 |
| Clinical psychologist | 12 |
| Nephrology | 11 |
| Hematology/oncology | 10 |
| Centralized Flu | 10 |
| Pulmonary disease | 10 |
| Speech / language pathology | 10 |
| Pediatric medicine | 8 |
| Pathology | 8 |
| Occupational therapist (private practice) | 8 |
| Gastroenterology | 7 |
| Neurosurgery | 7 |
| Urology | 6 |
| Endocrinology | 6 |
| Pain Management | 6 |
| Dermatology | 6 |
| General practice | 6 |
| Vascular surgery | 5 |
| Thoracic surgery | 5 |
| Pharmacy | 5 |
| Audiologist (billing independently) | 5 |
| Plastic and reconstructive surgery | 5 |
| Infectious disease | 4 |
| Rheumatology | 4 |
| Physical medicine and rehabilitation | 4 |
| Otolaryngology | 4 |
| Mental Health Counselors | 3 |
| Opioid Treatment Program | 3 |
| Clinical Laboratory (Billing Independently) | 3 |
| Radiation oncology | 3 |
| Interventional Cardiology | 3 |
| Cardiac surgery | 2 |
| Sleep Medicine | 2 |
| Critical care (intensivists) | 2 |
| Colorectal surgery (formerly proctology) | 1 |
| Addiction medicine | 1 |
| Psychologist (billing independently) | 1 |
| Unknown physician specialty | 1 |
| Dentist | 1 |
| Interventional radiology | 1 |
| Hand surgery | 1 |
| Cardiac Electrophysiology | 1 |
| Maxillofacial surgery | 1 |
| Hospice and Palliative Care | 1 |
| Osteopathic manipulative therapy | 1 |
| Gynecologist/oncologist | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Certified nurse midwife | 1 |
| Surgical oncology | 1 |
| Epileptologists | 1 |