| Nurse practitioner | 125 |
| Certified Registered Nurse Anesthetist (CRNA) | 71 |
| Family practice | 61 |
| Physician assistant | 53 |
| Anesthesiology | 34 |
| Hospitalist | 32 |
| Diagnostic Radiology | 31 |
| Orthopedic surgery | 29 |
| Emergency medicine | 26 |
| Internal medicine | 25 |
| Psychiatry | 24 |
| Mental Health Counselors | 22 |
| Physical therapist (private practice) | 21 |
| Optometrist | 21 |
| Licensed clinical social worker | 21 |
| Mass Immunization Roster Billers | 19 |
| Critical care (intensivists) | 19 |
| Ophthalmology | 18 |
| Chiropractic | 18 |
| Pathology | 15 |
| Hematology/oncology | 14 |
| Clinical psychologist | 14 |
| Neurology | 13 |
| Gastroenterology | 13 |
| Cardiology | 13 |
| Physical medicine and rehabilitation | 12 |
| Dermatology | 11 |
| Obstetrics/gynecology | 11 |
| General surgery | 9 |
| Urology | 8 |
| Endocrinology | 8 |
| Sports Medicine | 7 |
| Certified clinical nurse specialist | 6 |
| Nephrology | 6 |
| Otolaryngology | 5 |
| Radiation oncology | 5 |
| Infectious disease | 5 |
| Neurosurgery | 5 |
| Pulmonary disease | 5 |
| Cardiac Electrophysiology | 4 |
| Pediatric medicine | 4 |
| Gynecologist/oncologist | 4 |
| Occupational therapist (private practice) | 3 |
| Podiatry | 3 |
| Pain Management | 3 |
| Epileptologists | 3 |
| Pharmacy | 3 |
| Cardiac surgery | 3 |
| Interventional Cardiology | 3 |
| Vascular surgery | 3 |
| Hospice and Palliative Care | 2 |
| Plastic and reconstructive surgery | 2 |
| Hand surgery | 2 |
| Certified nurse midwife | 2 |
| Thoracic surgery | 2 |
| Sleep Medicine | 2 |
| Rheumatology | 2 |
| Speech / language pathology | 2 |
| Ambulatory Surgical Center | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Geriatric medicine | 2 |
| Interventional radiology | 2 |
| Neuropsychiatry | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| General practice | 1 |
| Marriage and Family Therapist | 1 |
| Interventional Pain Management (IPM) | 1 |
| Nuclear medicine | 1 |
| Opioid Treatment Program | 1 |
| Micrographic Dermatologic Surgery | 1 |
| General Psychiatry | 1 |
| Surgical oncology | 1 |
| Medical Genetics and Genomics | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Centralized Flu | 1 |