| Nurse practitioner | 588 |
| Physician assistant | 186 |
| Family practice | 165 |
| Chiropractic | 152 |
| Physical therapist (private practice) | 137 |
| Internal medicine | 133 |
| Certified Registered Nurse Anesthetist (CRNA) | 119 |
| Optometrist | 101 |
| Licensed clinical social worker | 98 |
| Emergency medicine | 88 |
| Diagnostic Radiology | 72 |
| Mass Immunization Roster Billers | 61 |
| Anesthesiology | 60 |
| Obstetrics/gynecology | 53 |
| Mental Health Counselors | 52 |
| General surgery | 44 |
| Hospitalist | 43 |
| Cardiology | 39 |
| Pediatric medicine | 39 |
| Podiatry | 34 |
| Occupational therapist (private practice) | 33 |
| Orthopedic surgery | 32 |
| Speech / language pathology | 30 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 28 |
| Critical care (intensivists) | 28 |
| Neurology | 26 |
| Centralized Flu | 24 |
| Interventional Cardiology | 22 |
| Psychiatry | 20 |
| Gastroenterology | 20 |
| Ophthalmology | 20 |
| Otolaryngology | 19 |
| Pulmonary disease | 18 |
| Clinical psychologist | 15 |
| Nephrology | 15 |
| Dermatology | 14 |
| Urology | 14 |
| Neurosurgery | 13 |
| Audiologist (billing independently) | 12 |
| Pathology | 12 |
| Radiation oncology | 11 |
| Medical oncology | 10 |
| Thoracic surgery | 10 |
| Pharmacy | 9 |
| Hematology/oncology | 9 |
| Ambulatory Surgical Center | 9 |
| Rheumatology | 9 |
| Certified nurse midwife | 9 |
| Infectious disease | 8 |
| Vascular surgery | 8 |
| Allergy/immunology | 7 |
| Plastic and reconstructive surgery | 7 |
| Cardiac Electrophysiology | 6 |
| Endocrinology | 6 |
| Independent Diagnostic Testing Facility (IDTF) | 6 |
| Anesthesiologist Assistant | 5 |
| Physical medicine and rehabilitation | 5 |
| General practice | 4 |
| Registered Dietician/Nutrition Professional | 4 |
| Clinical Laboratory (Billing Independently) | 4 |
| Cardiac surgery | 3 |
| Hematology | 2 |
| Sleep Medicine | 2 |
| Hospice and Palliative Care | 2 |
| Interventional radiology | 2 |
| Geriatric medicine | 2 |
| Marriage and Family Therapist | 2 |
| Interventional Pain Management (IPM) | 2 |
| Colorectal surgery (formerly proctology) | 1 |
| Opioid Treatment Program | 1 |
| Maxillofacial surgery | 1 |
| Epileptologists | 1 |
| Osteopathic manipulative therapy | 1 |
| Intensive Cardiac Rehabilitation | 1 |
| Unknown physician specialty | 1 |
| Home Infusion Therapy Services | 1 |
| Preventive medicine | 1 |
| Certified clinical nurse specialist | 1 |
| All other suppliers, e.g., Drug Stores | 1 |
| Hand surgery | 1 |
| Oral surgery (dentists only) | 1 |
| Unknown Provider | 1 |