| Family practice | 255 |
| Physical therapist (private practice) | 213 |
| Internal medicine | 160 |
| Nurse practitioner | 144 |
| Physician assistant | 139 |
| Optometrist | 85 |
| Anesthesiology | 84 |
| Chiropractic | 80 |
| Emergency medicine | 70 |
| Clinical psychologist | 67 |
| Marriage and Family Therapist | 64 |
| Mass Immunization Roster Billers | 55 |
| Psychiatry | 50 |
| Diagnostic Radiology | 46 |
| Obstetrics/gynecology | 44 |
| Licensed clinical social worker | 41 |
| Dermatology | 38 |
| Orthopedic surgery | 38 |
| Ophthalmology | 34 |
| Occupational therapist (private practice) | 31 |
| Podiatry | 28 |
| Cardiology | 25 |
| General surgery | 24 |
| Hospitalist | 22 |
| Neurology | 20 |
| Ambulatory Surgical Center | 19 |
| Registered Dietician/Nutrition Professional | 18 |
| Pathology | 16 |
| Gastroenterology | 16 |
| Otolaryngology | 15 |
| Hematology/oncology | 15 |
| Urology | 14 |
| Certified Registered Nurse Anesthetist (CRNA) | 13 |
| Plastic and reconstructive surgery | 13 |
| Pulmonary disease | 12 |
| Audiologist (billing independently) | 11 |
| General practice | 11 |
| Endocrinology | 11 |
| Physical medicine and rehabilitation | 10 |
| Nephrology | 9 |
| Speech / language pathology | 9 |
| Vascular surgery | 9 |
| Pediatric medicine | 8 |
| Mental Health Counselors | 8 |
| Neurosurgery | 8 |
| Infectious disease | 8 |
| Pain Management | 8 |
| Rheumatology | 7 |
| Critical care (intensivists) | 7 |
| Addiction medicine | 6 |
| Interventional Cardiology | 6 |
| Centralized Flu | 5 |
| Allergy/immunology | 5 |
| Thoracic surgery | 5 |
| Sports Medicine | 5 |
| Hand surgery | 5 |
| Opioid Treatment Program | 4 |
| Cardiac Electrophysiology | 3 |
| Pharmacy | 3 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| Hospice and Palliative Care | 3 |
| Psychologist (billing independently) | 3 |
| Medical oncology | 3 |
| Sleep Medicine | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Surgical oncology | 2 |
| Interventional radiology | 2 |
| Gynecologist/oncologist | 2 |
| Osteopathic manipulative therapy | 2 |
| Geriatric medicine | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Radiation oncology | 2 |
| Certified nurse midwife | 2 |
| Preventive medicine | 2 |
| Cardiac surgery | 1 |
| Oral surgery (dentists only) | 1 |
| Slide Preparation Facilities | 1 |
| Unknown physician specialty | 1 |
| Nuclear medicine | 1 |
| Interventional Pain Management (IPM) | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |