| Nurse practitioner | 300 |
| Physician assistant | 222 |
| Licensed clinical social worker | 182 |
| Internal medicine | 142 |
| Physical therapist (private practice) | 123 |
| Certified Registered Nurse Anesthetist (CRNA) | 118 |
| Family practice | 110 |
| Emergency medicine | 68 |
| Chiropractic | 59 |
| Mental Health Counselors | 56 |
| Diagnostic Radiology | 45 |
| Obstetrics/gynecology | 43 |
| Optometrist | 41 |
| Mass Immunization Roster Billers | 38 |
| Cardiology | 35 |
| Anesthesiology | 35 |
| Occupational therapist (private practice) | 33 |
| Clinical psychologist | 31 |
| Ophthalmology | 25 |
| Psychiatry | 25 |
| Pulmonary disease | 22 |
| General surgery | 22 |
| Podiatry | 22 |
| Orthopedic surgery | 21 |
| Gastroenterology | 16 |
| Neurology | 16 |
| Physical medicine and rehabilitation | 14 |
| Hematology/oncology | 13 |
| Neurosurgery | 12 |
| Speech / language pathology | 12 |
| Nephrology | 12 |
| Dermatology | 11 |
| Vascular surgery | 11 |
| Centralized Flu | 10 |
| Otolaryngology | 10 |
| Pathology | 10 |
| Ambulatory Surgical Center | 9 |
| Urology | 9 |
| Radiation oncology | 8 |
| Pediatric medicine | 7 |
| Hospitalist | 7 |
| Thoracic surgery | 7 |
| Rheumatology | 6 |
| Clinical Laboratory (Billing Independently) | 6 |
| Audiologist (billing independently) | 6 |
| Allergy/immunology | 6 |
| Certified nurse midwife | 5 |
| Infectious disease | 5 |
| Geriatric medicine | 4 |
| Plastic and reconstructive surgery | 4 |
| Endocrinology | 3 |
| Interventional Cardiology | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Opioid Treatment Program | 3 |
| Cardiac Electrophysiology | 3 |
| Marriage and Family Therapist | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Maxillofacial surgery | 3 |
| Interventional Pain Management (IPM) | 2 |
| Interventional radiology | 2 |
| Pain Management | 2 |
| Neuropsychiatry | 2 |
| Medical oncology | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Nuclear medicine | 2 |
| Critical care (intensivists) | 2 |
| Pharmacy | 1 |
| Gynecologist/oncologist | 1 |
| Preventive medicine | 1 |
| Psychologist (billing independently) | 1 |
| Oral surgery (dentists only) | 1 |
| Cardiac surgery | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Dentist | 1 |
| Anesthesiologist Assistant | 1 |