| Nurse practitioner | 136 |
| Physician assistant | 99 |
| Anesthesiologist Assistant | 45 |
| Anesthesiology | 32 |
| Hospitalist | 32 |
| Physical therapist (private practice) | 32 |
| Family practice | 31 |
| Internal medicine | 28 |
| Certified Registered Nurse Anesthetist (CRNA) | 23 |
| Emergency medicine | 21 |
| Diagnostic Radiology | 16 |
| General surgery | 16 |
| Mass Immunization Roster Billers | 11 |
| Licensed clinical social worker | 11 |
| Optometrist | 11 |
| Orthopedic surgery | 11 |
| Cardiology | 10 |
| Critical care (intensivists) | 10 |
| Pulmonary disease | 10 |
| Obstetrics/gynecology | 10 |
| Psychiatry | 10 |
| Neurology | 10 |
| Ophthalmology | 9 |
| Ambulatory Surgical Center | 9 |
| Chiropractic | 8 |
| Interventional Cardiology | 8 |
| Hematology/oncology | 7 |
| Mental Health Counselors | 7 |
| Endocrinology | 6 |
| Podiatry | 6 |
| Audiologist (billing independently) | 6 |
| Pathology | 6 |
| Otolaryngology | 6 |
| Nephrology | 6 |
| Centralized Flu | 6 |
| Gastroenterology | 6 |
| Occupational therapist (private practice) | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 6 |
| Clinical psychologist | 5 |
| Urology | 5 |
| Vascular surgery | 5 |
| Cardiac Electrophysiology | 5 |
| Infectious disease | 5 |
| Pharmacy | 4 |
| Plastic and reconstructive surgery | 4 |
| Dermatology | 4 |
| Physical medicine and rehabilitation | 4 |
| Neurosurgery | 4 |
| Rheumatology | 3 |
| Radiation oncology | 3 |
| Certified nurse midwife | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Advanced Heart Failure and Transplant Cardiology | 3 |
| Maxillofacial surgery | 2 |
| Sports Medicine | 2 |
| General practice | 2 |
| Geriatric medicine | 2 |
| Pain Management | 2 |
| Oral surgery (dentists only) | 1 |
| Speech / language pathology | 1 |
| Hospice and Palliative Care | 1 |
| Opioid Treatment Program | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Interventional Pain Management (IPM) | 1 |
| Hand surgery | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Allergy/immunology | 1 |
| Thoracic surgery | 1 |
| Marriage and Family Therapist | 1 |
| Gynecologist/oncologist | 1 |