| Nurse practitioner | 81 |
| Physician assistant | 53 |
| Family practice | 44 |
| Physical therapist (private practice) | 30 |
| Certified Registered Nurse Anesthetist (CRNA) | 29 |
| Licensed clinical social worker | 26 |
| Mental Health Counselors | 22 |
| Chiropractic | 20 |
| Emergency medicine | 19 |
| Diagnostic Radiology | 17 |
| Internal medicine | 12 |
| Optometrist | 10 |
| Psychiatry | 10 |
| Marriage and Family Therapist | 9 |
| Occupational therapist (private practice) | 9 |
| Speech / language pathology | 8 |
| Clinical psychologist | 8 |
| Hospitalist | 8 |
| Neurology | 8 |
| Anesthesiology | 8 |
| Orthopedic surgery | 8 |
| General surgery | 7 |
| Obstetrics/gynecology | 7 |
| Urology | 6 |
| Audiologist (billing independently) | 6 |
| Dermatology | 5 |
| Mass Immunization Roster Billers | 5 |
| Gastroenterology | 5 |
| Cardiology | 4 |
| Podiatry | 4 |
| Ophthalmology | 4 |
| Critical care (intensivists) | 4 |
| Pulmonary disease | 3 |
| Certified clinical nurse specialist | 3 |
| Hematology/oncology | 3 |
| Otolaryngology | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Neurosurgery | 3 |
| Certified nurse midwife | 3 |
| Pediatric medicine | 3 |
| Hospice and Palliative Care | 3 |
| Interventional Cardiology | 2 |
| Medical oncology | 2 |
| Radiation oncology | 2 |
| Ambulatory Surgical Center | 2 |
| Sports Medicine | 2 |
| Pain Management | 2 |
| Nephrology | 2 |
| Centralized Flu | 1 |
| Dentist | 1 |
| Pathology | 1 |
| Cardiac Electrophysiology | 1 |
| Hand surgery | 1 |
| Maxillofacial surgery | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Cardiac surgery | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Medicare Diabetes Preventive Program | 1 |
| Infectious disease | 1 |
| Plastic and reconstructive surgery | 1 |
| Allergy/immunology | 1 |
| Interventional radiology | 1 |
| Physical medicine and rehabilitation | 1 |
| Prosthodontics | 1 |