| Physical therapist (private practice) | 108 |
| Licensed clinical social worker | 85 |
| Nurse practitioner | 78 |
| Physician assistant | 71 |
| Family practice | 42 |
| Anesthesiology | 33 |
| Mental Health Counselors | 32 |
| Chiropractic | 22 |
| Internal medicine | 20 |
| Emergency medicine | 16 |
| Clinical psychologist | 16 |
| Orthopedic surgery | 14 |
| General surgery | 12 |
| Mass Immunization Roster Billers | 11 |
| Speech / language pathology | 11 |
| Optometrist | 10 |
| Occupational therapist (private practice) | 10 |
| Obstetrics/gynecology | 9 |
| Psychiatry | 9 |
| Hospitalist | 8 |
| Diagnostic Radiology | 7 |
| Ophthalmology | 6 |
| Dermatology | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 5 |
| Cardiology | 5 |
| Critical care (intensivists) | 5 |
| Ambulatory Surgical Center | 5 |
| Neurology | 4 |
| Nephrology | 4 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Urology | 4 |
| Physical medicine and rehabilitation | 4 |
| Registered Dietician/Nutrition Professional | 4 |
| Hematology/oncology | 4 |
| Pathology | 4 |
| Audiologist (billing independently) | 4 |
| Radiation oncology | 3 |
| Otolaryngology | 3 |
| Interventional Cardiology | 3 |
| Neurosurgery | 3 |
| Podiatry | 3 |
| Hospice and Palliative Care | 3 |
| Cardiac Electrophysiology | 2 |
| Thoracic surgery | 2 |
| Rheumatology | 2 |
| Allergy/immunology | 2 |
| Gastroenterology | 2 |
| Pharmacy | 2 |
| Certified clinical nurse specialist | 2 |
| Hand surgery | 2 |
| Certified nurse midwife | 2 |
| Infectious disease | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Centralized Flu | 2 |
| Opioid Treatment Program | 1 |
| Preventive medicine | 1 |
| Vascular surgery | 1 |
| Osteopathic manipulative therapy | 1 |
| Pain Management | 1 |
| Pediatric medicine | 1 |
| Geriatric medicine | 1 |
| Sleep Medicine | 1 |
| Hematology | 1 |
| General practice | 1 |
| Interventional Pain Management (IPM) | 1 |
| Psychologist (billing independently) | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Plastic and reconstructive surgery | 1 |
| Medical oncology | 1 |
| Marriage and Family Therapist | 1 |