| Nurse practitioner | 207 |
| Physical therapist (private practice) | 109 |
| Physician assistant | 77 |
| Internal medicine | 65 |
| Family practice | 65 |
| Anesthesiology | 62 |
| Diagnostic Radiology | 43 |
| Certified Registered Nurse Anesthetist (CRNA) | 40 |
| Emergency medicine | 39 |
| Clinical psychologist | 38 |
| Licensed clinical social worker | 38 |
| Hospitalist | 28 |
| Psychiatry | 26 |
| Orthopedic surgery | 25 |
| Obstetrics/gynecology | 24 |
| Cardiology | 23 |
| Neurology | 23 |
| Mental Health Counselors | 23 |
| Gastroenterology | 22 |
| Optometrist | 19 |
| Occupational therapist (private practice) | 19 |
| Pulmonary disease | 18 |
| Ophthalmology | 18 |
| Chiropractic | 18 |
| Mass Immunization Roster Billers | 17 |
| Dermatology | 16 |
| Infectious disease | 15 |
| Pathology | 15 |
| Physical medicine and rehabilitation | 13 |
| General surgery | 12 |
| Endocrinology | 11 |
| Speech / language pathology | 10 |
| Hematology/oncology | 10 |
| Geriatric medicine | 9 |
| Urology | 9 |
| Audiologist (billing independently) | 9 |
| Allergy/immunology | 9 |
| Medical oncology | 7 |
| Interventional radiology | 7 |
| Nephrology | 7 |
| Hand surgery | 6 |
| Hospice and Palliative Care | 6 |
| Podiatry | 6 |
| Radiation oncology | 6 |
| Critical care (intensivists) | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 5 |
| Neurosurgery | 5 |
| Pediatric medicine | 5 |
| Otolaryngology | 5 |
| Cardiac Electrophysiology | 5 |
| Plastic and reconstructive surgery | 5 |
| Advanced Heart Failure and Transplant Cardiology | 5 |
| Hematology | 4 |
| Epileptologists | 4 |
| Vascular surgery | 3 |
| Interventional Cardiology | 3 |
| Cardiac surgery | 3 |
| Certified nurse midwife | 3 |
| Surgical oncology | 3 |
| Centralized Flu | 3 |
| Pain Management | 2 |
| Gynecologist/oncologist | 2 |
| Nuclear medicine | 2 |
| Rheumatology | 2 |
| Sleep Medicine | 2 |
| Thoracic surgery | 2 |
| Ambulatory Surgical Center | 2 |
| Pharmacy | 2 |
| Certified clinical nurse specialist | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Sports Medicine | 1 |
| Opioid Treatment Program | 1 |
| Marriage and Family Therapist | 1 |
| Dentist | 1 |
| Medical Toxicology | 1 |
| Micrographic Dermatologic Surgery | 1 |
| General practice | 1 |