| Physician assistant | 183 |
| Nurse practitioner | 166 |
| Physical therapist (private practice) | 105 |
| Family practice | 97 |
| Licensed clinical social worker | 89 |
| Mental Health Counselors | 82 |
| Certified Registered Nurse Anesthetist (CRNA) | 58 |
| Internal medicine | 53 |
| Optometrist | 49 |
| Anesthesiology | 45 |
| Emergency medicine | 44 |
| Chiropractic | 44 |
| Occupational therapist (private practice) | 30 |
| Clinical psychologist | 29 |
| Obstetrics/gynecology | 28 |
| Diagnostic Radiology | 25 |
| Orthopedic surgery | 22 |
| General surgery | 21 |
| Mass Immunization Roster Billers | 19 |
| Psychiatry | 19 |
| Dermatology | 17 |
| Marriage and Family Therapist | 17 |
| Hospitalist | 16 |
| Audiologist (billing independently) | 15 |
| Cardiology | 15 |
| Neurology | 15 |
| Podiatry | 12 |
| Physical medicine and rehabilitation | 10 |
| Gastroenterology | 10 |
| Speech / language pathology | 10 |
| Certified nurse midwife | 10 |
| Ophthalmology | 9 |
| Pulmonary disease | 9 |
| Hematology/oncology | 9 |
| Pathology | 9 |
| Centralized Flu | 8 |
| Cardiac Electrophysiology | 8 |
| Interventional Cardiology | 8 |
| Urology | 8 |
| Interventional radiology | 7 |
| Clinical Laboratory (Billing Independently) | 6 |
| Endocrinology | 6 |
| Otolaryngology | 6 |
| Ambulatory Surgical Center | 5 |
| Critical care (intensivists) | 5 |
| Nephrology | 5 |
| Neurosurgery | 3 |
| General practice | 3 |
| Rheumatology | 3 |
| Medical oncology | 3 |
| Thoracic surgery | 3 |
| Radiation oncology | 3 |
| Vascular surgery | 3 |
| Infectious disease | 3 |
| Plastic and reconstructive surgery | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Gynecologist/oncologist | 2 |
| Osteopathic manipulative therapy | 2 |
| Hospice and Palliative Care | 2 |
| Surgical oncology | 2 |
| Certified clinical nurse specialist | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Sleep Medicine | 1 |
| Geriatric medicine | 1 |
| Opioid Treatment Program | 1 |
| Cardiac surgery | 1 |
| Preventive medicine | 1 |
| Pediatric medicine | 1 |
| Pharmacy | 1 |
| Medical Genetics and Genomics | 1 |
| Sports Medicine | 1 |
| Pain Management | 1 |
| Interventional Pain Management (IPM) | 1 |