| Nurse practitioner | 139 |
| Physical therapist (private practice) | 79 |
| Physician assistant | 78 |
| Family practice | 49 |
| Certified Registered Nurse Anesthetist (CRNA) | 40 |
| Chiropractic | 32 |
| Licensed clinical social worker | 25 |
| Emergency medicine | 24 |
| Hospitalist | 17 |
| Orthopedic surgery | 16 |
| Diagnostic Radiology | 15 |
| Mental Health Counselors | 15 |
| General surgery | 15 |
| Internal medicine | 14 |
| Optometrist | 11 |
| Pulmonary disease | 10 |
| Registered Dietician/Nutrition Professional | 8 |
| Obstetrics/gynecology | 8 |
| Gastroenterology | 8 |
| Otolaryngology | 8 |
| Occupational therapist (private practice) | 7 |
| Cardiology | 6 |
| Neurology | 6 |
| Urology | 6 |
| Mass Immunization Roster Billers | 5 |
| Audiologist (billing independently) | 5 |
| Hematology/oncology | 5 |
| Anesthesiology | 5 |
| Certified nurse midwife | 5 |
| Radiation oncology | 5 |
| Interventional Cardiology | 5 |
| Dermatology | 4 |
| Marriage and Family Therapist | 4 |
| Medical oncology | 4 |
| Pathology | 4 |
| Ophthalmology | 3 |
| Psychiatry | 3 |
| Ambulatory Surgical Center | 3 |
| Physical medicine and rehabilitation | 3 |
| Rheumatology | 3 |
| Nephrology | 3 |
| Vascular surgery | 3 |
| Podiatry | 3 |
| Thoracic surgery | 2 |
| Endocrinology | 2 |
| Centralized Flu | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Neurosurgery | 2 |
| Cardiac Electrophysiology | 2 |
| Plastic and reconstructive surgery | 2 |
| Osteopathic manipulative therapy | 2 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Critical care (intensivists) | 1 |
| Surgical oncology | 1 |
| Infectious disease | 1 |
| Cardiac surgery | 1 |
| Sleep Medicine | 1 |
| Unknown Provider | 1 |
| Interventional Pain Management (IPM) | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Allergy/immunology | 1 |
| Certified clinical nurse specialist | 1 |
| Medicare Diabetes Preventive Program | 1 |
| Pharmacy | 1 |
| Clinical psychologist | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Hand surgery | 1 |