| Nurse practitioner | 554 |
| Physician assistant | 495 |
| Family practice | 219 |
| Internal medicine | 212 |
| Certified Registered Nurse Anesthetist (CRNA) | 194 |
| Physical therapist (private practice) | 162 |
| Licensed clinical social worker | 117 |
| Obstetrics/gynecology | 88 |
| Emergency medicine | 88 |
| Diagnostic Radiology | 81 |
| Mental Health Counselors | 71 |
| Mass Immunization Roster Billers | 65 |
| Anesthesiology | 62 |
| Optometrist | 59 |
| Orthopedic surgery | 53 |
| Chiropractic | 50 |
| Hospitalist | 48 |
| General surgery | 48 |
| Cardiology | 46 |
| Psychiatry | 45 |
| Ophthalmology | 41 |
| Neurology | 38 |
| Occupational therapist (private practice) | 35 |
| Clinical psychologist | 31 |
| Gastroenterology | 31 |
| Podiatry | 29 |
| Urology | 26 |
| Dermatology | 25 |
| Nephrology | 25 |
| Audiologist (billing independently) | 24 |
| Centralized Flu | 23 |
| Hematology/oncology | 22 |
| Otolaryngology | 21 |
| Pulmonary disease | 19 |
| Physical medicine and rehabilitation | 16 |
| Sports Medicine | 16 |
| Neurosurgery | 15 |
| Certified nurse midwife | 15 |
| Pathology | 15 |
| Endocrinology | 14 |
| Pharmacy | 14 |
| Speech / language pathology | 13 |
| Allergy/immunology | 13 |
| Plastic and reconstructive surgery | 12 |
| Infectious disease | 11 |
| Ambulatory Surgical Center | 11 |
| Critical care (intensivists) | 10 |
| Rheumatology | 10 |
| Interventional Cardiology | 10 |
| Radiation oncology | 10 |
| Registered Dietician/Nutrition Professional | 10 |
| Marriage and Family Therapist | 9 |
| Cardiac Electrophysiology | 8 |
| Pediatric medicine | 8 |
| Independent Diagnostic Testing Facility (IDTF) | 7 |
| Clinical Laboratory (Billing Independently) | 7 |
| Vascular surgery | 7 |
| General practice | 7 |
| Medical oncology | 6 |
| Oral surgery (dentists only) | 6 |
| Hand surgery | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 5 |
| Interventional Pain Management (IPM) | 4 |
| Opioid Treatment Program | 4 |
| Advanced Heart Failure and Transplant Cardiology | 4 |
| Thoracic surgery | 4 |
| Sleep Medicine | 4 |
| Hospice and Palliative Care | 3 |
| Pain Management | 3 |
| Preventive medicine | 3 |
| Psychologist (billing independently) | 3 |
| Cardiac surgery | 2 |
| Peripheral vascular disease | 2 |
| Geriatric medicine | 2 |
| Surgical oncology | 2 |
| Maxillofacial surgery | 2 |
| Interventional radiology | 2 |
| Neuropsychiatry | 1 |
| Unknown Provider | 1 |
| Certified clinical nurse specialist | 1 |
| Medical Genetics and Genomics | 1 |
| Hematology | 1 |
| Addiction medicine | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 1 |
| General Psychiatry | 1 |