| Nurse practitioner | 222 |
| Internal medicine | 95 |
| Physician assistant | 92 |
| Family practice | 53 |
| Physical therapist (private practice) | 52 |
| Diagnostic Radiology | 38 |
| Anesthesiology | 31 |
| Certified Registered Nurse Anesthetist (CRNA) | 30 |
| Licensed clinical social worker | 29 |
| Chiropractic | 26 |
| Orthopedic surgery | 25 |
| Emergency medicine | 25 |
| Cardiology | 24 |
| Ophthalmology | 21 |
| Mental Health Counselors | 19 |
| Optometrist | 18 |
| Centralized Flu | 16 |
| Clinical psychologist | 16 |
| Mass Immunization Roster Billers | 16 |
| Obstetrics/gynecology | 16 |
| Gastroenterology | 15 |
| Occupational therapist (private practice) | 15 |
| Anesthesiologist Assistant | 13 |
| Neurology | 12 |
| Podiatry | 12 |
| Psychiatry | 11 |
| Dermatology | 11 |
| Physical medicine and rehabilitation | 11 |
| General surgery | 10 |
| Ambulatory Surgical Center | 9 |
| Urology | 8 |
| Hematology/oncology | 8 |
| Speech / language pathology | 7 |
| Pathology | 7 |
| Otolaryngology | 6 |
| Radiation oncology | 6 |
| Nephrology | 6 |
| Critical care (intensivists) | 5 |
| Plastic and reconstructive surgery | 5 |
| Pharmacy | 5 |
| Pulmonary disease | 5 |
| Hospitalist | 5 |
| Rheumatology | 4 |
| Interventional radiology | 4 |
| Medical oncology | 4 |
| Infectious disease | 4 |
| Endocrinology | 4 |
| General practice | 4 |
| Clinical Laboratory (Billing Independently) | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Audiologist (billing independently) | 3 |
| Neurosurgery | 3 |
| Pain Management | 3 |
| Thoracic surgery | 3 |
| Surgical oncology | 2 |
| Cardiac Electrophysiology | 2 |
| Geriatric medicine | 2 |
| Vascular surgery | 2 |
| Interventional Pain Management (IPM) | 1 |
| Pediatric medicine | 1 |
| Allergy/immunology | 1 |
| Osteopathic manipulative therapy | 1 |
| Preventive medicine | 1 |
| Sports Medicine | 1 |
| Opioid Treatment Program | 1 |
| Sleep Medicine | 1 |
| Interventional Cardiology | 1 |
| Registered Dietician/Nutrition Professional | 1 |
| Addiction medicine | 1 |
| Hand surgery | 1 |
| Marriage and Family Therapist | 1 |
| Hospice and Palliative Care | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Cardiac surgery | 1 |