| Nurse practitioner | 107 |
| Licensed clinical social worker | 99 |
| Physician assistant | 87 |
| Family practice | 83 |
| Physical therapist (private practice) | 56 |
| Internal medicine | 36 |
| Clinical psychologist | 30 |
| Chiropractic | 28 |
| Psychiatry | 23 |
| Emergency medicine | 23 |
| Mass Immunization Roster Billers | 19 |
| Anesthesiology | 17 |
| Certified nurse midwife | 17 |
| Mental Health Counselors | 16 |
| Optometrist | 15 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 13 |
| Obstetrics/gynecology | 12 |
| Diagnostic Radiology | 11 |
| Podiatry | 9 |
| General surgery | 9 |
| Cardiology | 9 |
| Orthopedic surgery | 7 |
| Ophthalmology | 7 |
| Certified Registered Nurse Anesthetist (CRNA) | 7 |
| Occupational therapist (private practice) | 7 |
| Centralized Flu | 6 |
| Physical medicine and rehabilitation | 5 |
| Pulmonary disease | 5 |
| Urology | 5 |
| Neurology | 5 |
| Gastroenterology | 5 |
| Otolaryngology | 4 |
| Pathology | 4 |
| Pediatric medicine | 4 |
| Hospitalist | 4 |
| Neurosurgery | 4 |
| Dermatology | 4 |
| Sports Medicine | 4 |
| Speech / language pathology | 4 |
| Critical care (intensivists) | 3 |
| Radiation oncology | 3 |
| Marriage and Family Therapist | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Plastic and reconstructive surgery | 3 |
| Nephrology | 3 |
| Cardiac surgery | 2 |
| Interventional radiology | 2 |
| Audiologist (billing independently) | 2 |
| Rheumatology | 2 |
| Hematology/oncology | 2 |
| Infectious disease | 2 |
| Endocrinology | 2 |
| Geriatric medicine | 2 |
| Pharmacy | 2 |
| Sleep Medicine | 1 |
| Pain Management | 1 |
| Vascular surgery | 1 |
| Addiction medicine | 1 |
| Hand surgery | 1 |
| Radiation Therapy Centers | 1 |
| Osteopathic manipulative therapy | 1 |
| Cardiac Electrophysiology | 1 |
| Gynecologist/oncologist | 1 |
| Allergy/immunology | 1 |
| Neuropsychiatry | 1 |
| Ambulatory Surgical Center | 1 |
| Interventional Pain Management (IPM) | 1 |
| General practice | 1 |