| Nurse practitioner | 240 |
| Physical therapist (private practice) | 129 |
| Physician assistant | 119 |
| Family practice | 73 |
| Certified Registered Nurse Anesthetist (CRNA) | 58 |
| Chiropractic | 55 |
| Licensed clinical social worker | 47 |
| Internal medicine | 45 |
| Mental Health Counselors | 35 |
| Optometrist | 34 |
| Diagnostic Radiology | 31 |
| Orthopedic surgery | 31 |
| Emergency medicine | 28 |
| Anesthesiology | 27 |
| Obstetrics/gynecology | 16 |
| Occupational therapist (private practice) | 16 |
| General surgery | 16 |
| Mass Immunization Roster Billers | 15 |
| Psychiatry | 14 |
| Cardiology | 12 |
| Clinical psychologist | 12 |
| Hospitalist | 12 |
| Ophthalmology | 10 |
| Registered Dietician/Nutrition Professional | 10 |
| Pathology | 10 |
| Hematology/oncology | 9 |
| Physical medicine and rehabilitation | 9 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 9 |
| Audiologist (billing independently) | 9 |
| Anesthesiologist Assistant | 8 |
| Gastroenterology | 8 |
| Podiatry | 7 |
| Pulmonary disease | 7 |
| Speech / language pathology | 7 |
| Rheumatology | 6 |
| Centralized Flu | 6 |
| Allergy/immunology | 6 |
| Neurology | 5 |
| Urology | 5 |
| Critical care (intensivists) | 5 |
| Nephrology | 5 |
| Otolaryngology | 5 |
| Neurosurgery | 4 |
| Pediatric medicine | 4 |
| Pain Management | 4 |
| Endocrinology | 4 |
| Marriage and Family Therapist | 4 |
| Plastic and reconstructive surgery | 4 |
| Medical oncology | 4 |
| Dermatology | 4 |
| Infectious disease | 4 |
| Interventional radiology | 3 |
| Cardiac Electrophysiology | 3 |
| Certified nurse midwife | 3 |
| Ambulatory Surgical Center | 3 |
| Preventive medicine | 2 |
| Hospice and Palliative Care | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Radiation oncology | 2 |
| Interventional Cardiology | 2 |
| General practice | 1 |
| Osteopathic manipulative therapy | 1 |
| Vascular surgery | 1 |
| Sleep Medicine | 1 |
| Hand surgery | 1 |
| Interventional Pain Management (IPM) | 1 |
| Sports Medicine | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Surgical oncology | 1 |
| Addiction medicine | 1 |
| Thoracic surgery | 1 |
| Oral surgery (dentists only) | 1 |
| Gynecologist/oncologist | 1 |