| Nurse practitioner | 349 |
| Physician assistant | 185 |
| Internal medicine | 115 |
| Licensed clinical social worker | 105 |
| Family practice | 90 |
| Certified Registered Nurse Anesthetist (CRNA) | 74 |
| Mental Health Counselors | 70 |
| Physical therapist (private practice) | 59 |
| Emergency medicine | 47 |
| Clinical psychologist | 42 |
| Orthopedic surgery | 39 |
| Anesthesiology | 37 |
| Obstetrics/gynecology | 36 |
| Optometrist | 35 |
| Diagnostic Radiology | 34 |
| Chiropractic | 33 |
| Psychiatry | 27 |
| Mass Immunization Roster Billers | 25 |
| General surgery | 23 |
| Cardiology | 21 |
| Gastroenterology | 19 |
| Neurology | 17 |
| Podiatry | 16 |
| Ophthalmology | 15 |
| Pathology | 14 |
| Certified nurse midwife | 13 |
| Rheumatology | 13 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 13 |
| Pediatric medicine | 12 |
| Urology | 11 |
| Dermatology | 10 |
| Hematology/oncology | 10 |
| Endocrinology | 10 |
| Critical care (intensivists) | 9 |
| Vascular surgery | 8 |
| Physical medicine and rehabilitation | 8 |
| Audiologist (billing independently) | 8 |
| Occupational therapist (private practice) | 6 |
| Radiation oncology | 6 |
| Centralized Flu | 6 |
| Ambulatory Surgical Center | 6 |
| Infectious disease | 6 |
| Thoracic surgery | 5 |
| Hospitalist | 5 |
| Neurosurgery | 5 |
| Registered Dietician/Nutrition Professional | 4 |
| Osteopathic manipulative therapy | 4 |
| Geriatric medicine | 4 |
| Nephrology | 4 |
| Pulmonary disease | 4 |
| Marriage and Family Therapist | 4 |
| Otolaryngology | 4 |
| Pain Management | 3 |
| Allergy/immunology | 3 |
| Medical oncology | 3 |
| Interventional Cardiology | 3 |
| Plastic and reconstructive surgery | 3 |
| General Psychiatry | 3 |
| Speech / language pathology | 2 |
| Opioid Treatment Program | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Hospice and Palliative Care | 2 |
| Radiation Therapy Centers | 1 |
| Pharmacy | 1 |
| Sleep Medicine | 1 |
| Dentist | 1 |
| General practice | 1 |