| Nurse practitioner | 179 |
| Chiropractic | 74 |
| Physician assistant | 53 |
| Physical therapist (private practice) | 51 |
| Internal medicine | 44 |
| Emergency medicine | 38 |
| Family practice | 36 |
| Licensed clinical social worker | 29 |
| Certified Registered Nurse Anesthetist (CRNA) | 24 |
| Diagnostic Radiology | 21 |
| Optometrist | 21 |
| Mass Immunization Roster Billers | 20 |
| Anesthesiology | 20 |
| Mental Health Counselors | 19 |
| Obstetrics/gynecology | 15 |
| General surgery | 13 |
| Psychiatry | 13 |
| Occupational therapist (private practice) | 13 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 12 |
| Ophthalmology | 8 |
| Podiatry | 8 |
| Orthopedic surgery | 8 |
| Centralized Flu | 7 |
| Neurology | 7 |
| Clinical psychologist | 7 |
| Pathology | 7 |
| Interventional Cardiology | 6 |
| Hospitalist | 6 |
| Gastroenterology | 6 |
| Urology | 6 |
| Dermatology | 5 |
| Nephrology | 5 |
| Endocrinology | 4 |
| Audiologist (billing independently) | 4 |
| Pulmonary disease | 4 |
| Hematology/oncology | 4 |
| Clinical Laboratory (Billing Independently) | 4 |
| Radiation oncology | 3 |
| Ambulatory Surgical Center | 3 |
| Otolaryngology | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| Cardiology | 3 |
| Physical medicine and rehabilitation | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Hand surgery | 3 |
| Rheumatology | 2 |
| Pediatric medicine | 2 |
| Cardiac Electrophysiology | 2 |
| Oral surgery (dentists only) | 2 |
| Speech / language pathology | 2 |
| Critical care (intensivists) | 1 |
| Sleep Medicine | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Thoracic surgery | 1 |
| Opioid Treatment Program | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| General practice | 1 |
| Epileptologists | 1 |
| Gynecologist/oncologist | 1 |
| Sports Medicine | 1 |
| Neurosurgery | 1 |
| Surgical oncology | 1 |
| Certified clinical nurse specialist | 1 |
| Certified nurse midwife | 1 |
| Infectious disease | 1 |
| Medical oncology | 1 |
| Marriage and Family Therapist | 1 |
| Allergy/immunology | 1 |