| Nurse practitioner | 366 |
| Family practice | 122 |
| Licensed clinical social worker | 97 |
| Physician assistant | 94 |
| Physical therapist (private practice) | 81 |
| Internal medicine | 76 |
| Chiropractic | 68 |
| Emergency medicine | 65 |
| Mental Health Counselors | 54 |
| Certified Registered Nurse Anesthetist (CRNA) | 52 |
| Anesthesiology | 52 |
| Hospitalist | 44 |
| Optometrist | 43 |
| Obstetrics/gynecology | 35 |
| General surgery | 34 |
| Diagnostic Radiology | 31 |
| Orthopedic surgery | 28 |
| Mass Immunization Roster Billers | 27 |
| Occupational therapist (private practice) | 25 |
| Gastroenterology | 20 |
| Podiatry | 18 |
| Cardiology | 17 |
| Ophthalmology | 17 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 16 |
| Centralized Flu | 15 |
| Psychiatry | 15 |
| Clinical psychologist | 15 |
| Pathology | 13 |
| Nephrology | 12 |
| Audiologist (billing independently) | 12 |
| Neurology | 11 |
| Neurosurgery | 10 |
| Otolaryngology | 10 |
| Pulmonary disease | 10 |
| Radiation oncology | 9 |
| Hematology/oncology | 9 |
| Interventional Cardiology | 8 |
| Clinical Laboratory (Billing Independently) | 8 |
| Pediatric medicine | 7 |
| Urology | 7 |
| Critical care (intensivists) | 7 |
| Pain Management | 7 |
| Dermatology | 6 |
| Endocrinology | 6 |
| Physical medicine and rehabilitation | 6 |
| Vascular surgery | 6 |
| Cardiac Electrophysiology | 6 |
| Interventional radiology | 5 |
| Rheumatology | 5 |
| Ambulatory Surgical Center | 5 |
| Registered Dietician/Nutrition Professional | 5 |
| Medical oncology | 5 |
| Plastic and reconstructive surgery | 5 |
| Infectious disease | 4 |
| Certified nurse midwife | 4 |
| Speech / language pathology | 4 |
| Certified clinical nurse specialist | 4 |
| Marriage and Family Therapist | 4 |
| Thoracic surgery | 3 |
| Hospice and Palliative Care | 3 |
| General practice | 2 |
| Allergy/immunology | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Opioid Treatment Program | 1 |
| Cardiac surgery | 1 |
| Hand surgery | 1 |