| Nurse practitioner | 37 |
| Emergency medicine | 27 |
| Family practice | 25 |
| Certified Registered Nurse Anesthetist (CRNA) | 17 |
| Physician assistant | 15 |
| Internal medicine | 15 |
| Physical therapist (private practice) | 13 |
| Optometrist | 12 |
| General surgery | 9 |
| Hospitalist | 9 |
| Diagnostic Radiology | 9 |
| Orthopedic surgery | 8 |
| Mass Immunization Roster Billers | 7 |
| Chiropractic | 7 |
| Obstetrics/gynecology | 6 |
| Mental Health Counselors | 5 |
| Nephrology | 5 |
| Otolaryngology | 4 |
| Licensed clinical social worker | 4 |
| Anesthesiology | 4 |
| Psychiatry | 4 |
| Neurology | 3 |
| Neurosurgery | 3 |
| Hematology/oncology | 3 |
| Podiatry | 3 |
| Ophthalmology | 3 |
| Cardiology | 3 |
| Dermatology | 3 |
| Urology | 3 |
| Occupational therapist (private practice) | 2 |
| Radiation oncology | 2 |
| Ambulatory Surgical Center | 2 |
| Speech / language pathology | 2 |
| Cardiac surgery | 2 |
| Rheumatology | 1 |
| Infectious disease | 1 |
| Audiologist (billing independently) | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Pathology | 1 |
| General practice | 1 |
| Pulmonary disease | 1 |
| Marriage and Family Therapist | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Centralized Flu | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Certified clinical nurse specialist | 1 |