| Nurse practitioner | 442 |
| Physician assistant | 409 |
| Physical therapist (private practice) | 277 |
| Certified Registered Nurse Anesthetist (CRNA) | 167 |
| Licensed clinical social worker | 129 |
| Family practice | 126 |
| Internal medicine | 116 |
| Chiropractic | 87 |
| Optometrist | 87 |
| Mental Health Counselors | 78 |
| Emergency medicine | 66 |
| Hospitalist | 58 |
| Anesthesiology | 52 |
| Mass Immunization Roster Billers | 48 |
| Occupational therapist (private practice) | 48 |
| Diagnostic Radiology | 46 |
| Obstetrics/gynecology | 43 |
| Clinical psychologist | 43 |
| General surgery | 37 |
| Orthopedic surgery | 37 |
| Cardiology | 36 |
| Psychiatry | 34 |
| Ophthalmology | 30 |
| Dermatology | 26 |
| Speech / language pathology | 26 |
| Gastroenterology | 24 |
| Urology | 19 |
| Neurology | 19 |
| Centralized Flu | 18 |
| Registered Dietician/Nutrition Professional | 17 |
| Podiatry | 17 |
| Pulmonary disease | 15 |
| Audiologist (billing independently) | 15 |
| Pathology | 14 |
| Otolaryngology | 14 |
| Plastic and reconstructive surgery | 13 |
| Hematology/oncology | 13 |
| Pediatric medicine | 13 |
| Certified nurse midwife | 12 |
| Endocrinology | 10 |
| Rheumatology | 9 |
| Nephrology | 9 |
| Physical medicine and rehabilitation | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 8 |
| Radiation oncology | 8 |
| Ambulatory Surgical Center | 8 |
| Medical oncology | 7 |
| Neurosurgery | 7 |
| Pharmacy | 7 |
| Pain Management | 6 |
| General practice | 6 |
| Infectious disease | 6 |
| Interventional Cardiology | 6 |
| Sports Medicine | 5 |
| Anesthesiologist Assistant | 5 |
| Critical care (intensivists) | 4 |
| Allergy/immunology | 4 |
| Thoracic surgery | 4 |
| Gynecologist/oncologist | 4 |
| Interventional Pain Management (IPM) | 4 |
| Hand surgery | 4 |
| Surgical oncology | 3 |
| Colorectal surgery (formerly proctology) | 3 |
| Vascular surgery | 3 |
| Osteopathic manipulative therapy | 3 |
| Marriage and Family Therapist | 3 |
| Clinical Laboratory (Billing Independently) | 3 |
| Cardiac Electrophysiology | 2 |
| Opioid Treatment Program | 2 |
| Maxillofacial surgery | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Dentist | 1 |
| Geriatric medicine | 1 |
| Cardiac surgery | 1 |
| Interventional radiology | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Unknown Provider | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Oral surgery (dentists only) | 1 |
| Home Infusion Therapy Services | 1 |