| Nurse practitioner | 320 |
| Physician assistant | 178 |
| Internal medicine | 146 |
| Family practice | 111 |
| Certified Registered Nurse Anesthetist (CRNA) | 87 |
| Emergency medicine | 78 |
| Anesthesiology | 57 |
| Mental Health Counselors | 55 |
| Licensed clinical social worker | 44 |
| General surgery | 40 |
| Chiropractic | 39 |
| Diagnostic Radiology | 38 |
| Obstetrics/gynecology | 37 |
| Psychiatry | 32 |
| Optometrist | 31 |
| Clinical psychologist | 31 |
| Mass Immunization Roster Billers | 30 |
| Neurology | 26 |
| Orthopedic surgery | 26 |
| Pathology | 21 |
| Pulmonary disease | 19 |
| Ophthalmology | 19 |
| Cardiology | 17 |
| Nephrology | 15 |
| Dermatology | 15 |
| Gastroenterology | 15 |
| Podiatry | 15 |
| Physical therapist (private practice) | 14 |
| Physical medicine and rehabilitation | 13 |
| Pharmacy | 12 |
| Urology | 12 |
| Otolaryngology | 11 |
| Pediatric medicine | 10 |
| Neurosurgery | 10 |
| Audiologist (billing independently) | 9 |
| Pain Management | 8 |
| Marriage and Family Therapist | 8 |
| Interventional Cardiology | 8 |
| Endocrinology | 8 |
| Interventional radiology | 7 |
| Infectious disease | 7 |
| Rheumatology | 7 |
| Hematology/oncology | 7 |
| Centralized Flu | 6 |
| Plastic and reconstructive surgery | 6 |
| Radiation oncology | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 6 |
| Thoracic surgery | 6 |
| Hospitalist | 6 |
| Registered Dietician/Nutrition Professional | 5 |
| Vascular surgery | 5 |
| Cardiac Electrophysiology | 4 |
| Allergy/immunology | 4 |
| Geriatric medicine | 4 |
| Medical oncology | 4 |
| Ambulatory Surgical Center | 3 |
| Certified clinical nurse specialist | 3 |
| Colorectal surgery (formerly proctology) | 3 |
| General practice | 2 |
| Hospice and Palliative Care | 2 |
| Dentist | 2 |
| Interventional Pain Management (IPM) | 2 |
| Anesthesiologist Assistant | 2 |
| Occupational therapist (private practice) | 2 |
| Critical care (intensivists) | 2 |
| Medical Genetics and Genomics | 2 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Psychologist (billing independently) | 1 |
| Opioid Treatment Program | 1 |
| Hematology | 1 |
| Nuclear medicine | 1 |
| Maxillofacial surgery | 1 |
| Hand surgery | 1 |
| Certified nurse midwife | 1 |
| Gynecologist/oncologist | 1 |
| Surgical oncology | 1 |