| Nurse practitioner | 231 |
| Family practice | 86 |
| Licensed clinical social worker | 66 |
| Physician assistant | 64 |
| Physical therapist (private practice) | 55 |
| Emergency medicine | 50 |
| Chiropractic | 48 |
| Internal medicine | 46 |
| Certified Registered Nurse Anesthetist (CRNA) | 36 |
| Optometrist | 31 |
| Anesthesiology | 30 |
| Hospitalist | 27 |
| Mental Health Counselors | 26 |
| Obstetrics/gynecology | 25 |
| Diagnostic Radiology | 22 |
| General surgery | 22 |
| Orthopedic surgery | 22 |
| Occupational therapist (private practice) | 20 |
| Mass Immunization Roster Billers | 16 |
| Cardiology | 15 |
| Clinical psychologist | 12 |
| Gastroenterology | 12 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 11 |
| Podiatry | 11 |
| Centralized Flu | 10 |
| Psychiatry | 10 |
| Neurosurgery | 9 |
| Ophthalmology | 8 |
| Pulmonary disease | 8 |
| Interventional Cardiology | 7 |
| Nephrology | 7 |
| Urology | 7 |
| Neurology | 7 |
| Pathology | 7 |
| Audiologist (billing independently) | 7 |
| Clinical Laboratory (Billing Independently) | 6 |
| Otolaryngology | 6 |
| Interventional radiology | 5 |
| Rheumatology | 5 |
| Radiation oncology | 5 |
| Cardiac Electrophysiology | 5 |
| Pediatric medicine | 4 |
| Dermatology | 4 |
| Physical medicine and rehabilitation | 4 |
| Critical care (intensivists) | 4 |
| Registered Dietician/Nutrition Professional | 4 |
| Endocrinology | 3 |
| Certified nurse midwife | 3 |
| Ambulatory Surgical Center | 3 |
| Hematology/oncology | 3 |
| Speech / language pathology | 3 |
| Pain Management | 3 |
| Infectious disease | 2 |
| Thoracic surgery | 2 |
| Vascular surgery | 2 |
| General practice | 2 |
| Medical oncology | 2 |
| Allergy/immunology | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Certified clinical nurse specialist | 2 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Plastic and reconstructive surgery | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Hospice and Palliative Care | 1 |
| Opioid Treatment Program | 1 |
| Cardiac surgery | 1 |