| Nurse practitioner | 375 |
| Family practice | 116 |
| Physician assistant | 115 |
| Chiropractic | 105 |
| Physical therapist (private practice) | 91 |
| Internal medicine | 87 |
| Certified Registered Nurse Anesthetist (CRNA) | 80 |
| Optometrist | 64 |
| Licensed clinical social worker | 62 |
| Emergency medicine | 54 |
| Diagnostic Radiology | 47 |
| Anesthesiology | 38 |
| Mass Immunization Roster Billers | 37 |
| Obstetrics/gynecology | 35 |
| Cardiology | 33 |
| Hospitalist | 30 |
| Mental Health Counselors | 28 |
| General surgery | 26 |
| Speech / language pathology | 24 |
| Critical care (intensivists) | 22 |
| Occupational therapist (private practice) | 22 |
| Orthopedic surgery | 21 |
| Pediatric medicine | 21 |
| Neurology | 19 |
| Centralized Flu | 19 |
| Podiatry | 17 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 15 |
| Interventional Cardiology | 14 |
| Pulmonary disease | 14 |
| Psychiatry | 13 |
| Gastroenterology | 12 |
| Clinical psychologist | 11 |
| Dermatology | 10 |
| Urology | 10 |
| Ophthalmology | 10 |
| Otolaryngology | 10 |
| Nephrology | 10 |
| Medical oncology | 9 |
| Audiologist (billing independently) | 8 |
| Hematology/oncology | 7 |
| Vascular surgery | 7 |
| Pharmacy | 6 |
| Pathology | 6 |
| Rheumatology | 6 |
| Thoracic surgery | 6 |
| Neurosurgery | 5 |
| Endocrinology | 5 |
| Ambulatory Surgical Center | 5 |
| Radiation oncology | 5 |
| Allergy/immunology | 5 |
| Certified nurse midwife | 5 |
| Infectious disease | 5 |
| Plastic and reconstructive surgery | 5 |
| Physical medicine and rehabilitation | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 4 |
| Anesthesiologist Assistant | 3 |
| Cardiac Electrophysiology | 3 |
| Clinical Laboratory (Billing Independently) | 3 |
| Hematology | 2 |
| Sleep Medicine | 2 |
| Hospice and Palliative Care | 2 |
| General practice | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Interventional Pain Management (IPM) | 2 |
| Cardiac surgery | 2 |
| Colorectal surgery (formerly proctology) | 1 |
| Opioid Treatment Program | 1 |
| Interventional radiology | 1 |
| Geriatric medicine | 1 |
| Marriage and Family Therapist | 1 |
| Maxillofacial surgery | 1 |
| Epileptologists | 1 |
| Osteopathic manipulative therapy | 1 |
| Intensive Cardiac Rehabilitation | 1 |
| Unknown physician specialty | 1 |