| Nurse practitioner | 299 |
| Family practice | 187 |
| Physician assistant | 183 |
| Physical therapist (private practice) | 182 |
| Internal medicine | 118 |
| Chiropractic | 71 |
| Emergency medicine | 55 |
| Mental Health Counselors | 48 |
| Optometrist | 48 |
| Anesthesiology | 47 |
| Licensed clinical social worker | 46 |
| Obstetrics/gynecology | 37 |
| Hospitalist | 36 |
| Mass Immunization Roster Billers | 33 |
| Orthopedic surgery | 31 |
| Clinical psychologist | 31 |
| General surgery | 28 |
| Certified Registered Nurse Anesthetist (CRNA) | 26 |
| Dermatology | 24 |
| Occupational therapist (private practice) | 23 |
| Podiatry | 22 |
| Diagnostic Radiology | 20 |
| Psychiatry | 20 |
| Cardiology | 20 |
| Physical medicine and rehabilitation | 18 |
| Neurology | 17 |
| Gastroenterology | 15 |
| Ophthalmology | 15 |
| Hematology/oncology | 13 |
| Pathology | 11 |
| Ambulatory Surgical Center | 10 |
| Pulmonary disease | 10 |
| Certified nurse midwife | 9 |
| Audiologist (billing independently) | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 9 |
| Registered Dietician/Nutrition Professional | 9 |
| Otolaryngology | 8 |
| Nephrology | 8 |
| Pharmacy | 7 |
| Centralized Flu | 7 |
| Infectious disease | 7 |
| Urology | 7 |
| Interventional Cardiology | 6 |
| Endocrinology | 6 |
| Medical oncology | 5 |
| Marriage and Family Therapist | 5 |
| Neurosurgery | 5 |
| Rheumatology | 5 |
| Critical care (intensivists) | 4 |
| Hand surgery | 4 |
| Vascular surgery | 4 |
| General practice | 4 |
| Plastic and reconstructive surgery | 4 |
| Sleep Medicine | 3 |
| Allergy/immunology | 3 |
| Hospice and Palliative Care | 3 |
| Pediatric medicine | 3 |
| Osteopathic manipulative therapy | 2 |
| Preventive medicine | 2 |
| Sports Medicine | 2 |
| Addiction medicine | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Pain Management | 2 |
| Thoracic surgery | 1 |
| Cardiac surgery | 1 |
| Home Infusion Therapy Services | 1 |
| Psychologist (billing independently) | 1 |
| Unknown physician specialty | 1 |
| Cardiac Electrophysiology | 1 |
| Speech / language pathology | 1 |
| Gynecologist/oncologist | 1 |
| Radiation oncology | 1 |