| Nurse practitioner | 216 |
| Physician assistant | 125 |
| Certified Registered Nurse Anesthetist (CRNA) | 96 |
| Internal medicine | 93 |
| Family practice | 75 |
| Physical therapist (private practice) | 53 |
| Emergency medicine | 47 |
| Diagnostic Radiology | 41 |
| Obstetrics/gynecology | 38 |
| Anesthesiology | 34 |
| General surgery | 30 |
| Licensed clinical social worker | 29 |
| Mental Health Counselors | 21 |
| Nephrology | 20 |
| Cardiology | 19 |
| Pathology | 19 |
| Neurology | 19 |
| Gastroenterology | 18 |
| Psychiatry | 18 |
| Orthopedic surgery | 18 |
| Optometrist | 17 |
| Mass Immunization Roster Billers | 17 |
| Pulmonary disease | 16 |
| Pediatric medicine | 15 |
| Chiropractic | 14 |
| Physical medicine and rehabilitation | 12 |
| Ophthalmology | 11 |
| Registered Dietician/Nutrition Professional | 11 |
| Clinical psychologist | 11 |
| Urology | 11 |
| Infectious disease | 10 |
| Podiatry | 9 |
| Anesthesiologist Assistant | 9 |
| Otolaryngology | 8 |
| Interventional Cardiology | 8 |
| Endocrinology | 8 |
| Centralized Flu | 8 |
| Hematology/oncology | 7 |
| Marriage and Family Therapist | 7 |
| Ambulatory Surgical Center | 6 |
| Neurosurgery | 6 |
| Hospitalist | 6 |
| Dermatology | 6 |
| Audiologist (billing independently) | 6 |
| Certified nurse midwife | 6 |
| Cardiac Electrophysiology | 5 |
| Plastic and reconstructive surgery | 5 |
| Radiation oncology | 5 |
| Speech / language pathology | 5 |
| Thoracic surgery | 5 |
| Vascular surgery | 5 |
| Occupational therapist (private practice) | 5 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 4 |
| Surgical oncology | 4 |
| Rheumatology | 4 |
| Pharmacy | 4 |
| Dentist | 3 |
| Cardiac surgery | 3 |
| Critical care (intensivists) | 3 |
| Neuropsychiatry | 3 |
| Medical Toxicology | 2 |
| Interventional radiology | 2 |
| Medical oncology | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Allergy/immunology | 1 |
| Pain Management | 1 |
| Hospice and Palliative Care | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Hematology | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Opioid Treatment Program | 1 |