| Internal medicine | 22 |
| Physical therapist (private practice) | 16 |
| Emergency medicine | 13 |
| Nurse practitioner | 13 |
| Licensed clinical social worker | 10 |
| Physician assistant | 8 |
| Optometrist | 7 |
| Family practice | 7 |
| Obstetrics/gynecology | 6 |
| General surgery | 6 |
| Occupational therapist (private practice) | 6 |
| Clinical psychologist | 6 |
| Certified Registered Nurse Anesthetist (CRNA) | 5 |
| Ophthalmology | 5 |
| Chiropractic | 5 |
| Diagnostic Radiology | 4 |
| Cardiology | 3 |
| General practice | 3 |
| Orthopedic surgery | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Anesthesiology | 3 |
| Ambulatory Surgical Center | 2 |
| Speech / language pathology | 2 |
| Otolaryngology | 2 |
| Urology | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Psychiatry | 2 |
| Neurology | 2 |
| Podiatry | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Mental Health Counselors | 2 |
| Rheumatology | 1 |
| Gastroenterology | 1 |
| Dermatology | 1 |
| Maxillofacial surgery | 1 |
| Medical oncology | 1 |
| Pharmacy | 1 |
| Pulmonary disease | 1 |
| Allergy/immunology | 1 |
| Physical medicine and rehabilitation | 1 |
| Vascular surgery | 1 |
| Audiologist (billing independently) | 1 |
| Plastic and reconstructive surgery | 1 |
| Infectious disease | 1 |
| Pathology | 1 |
| Nephrology | 1 |