| Nurse practitioner | 618 |
| Physician assistant | 328 |
| Family practice | 223 |
| Internal medicine | 205 |
| Licensed clinical social worker | 176 |
| Emergency medicine | 134 |
| Mental Health Counselors | 130 |
| Physical therapist (private practice) | 116 |
| Certified Registered Nurse Anesthetist (CRNA) | 100 |
| Clinical psychologist | 81 |
| Diagnostic Radiology | 66 |
| Psychiatry | 61 |
| Obstetrics/gynecology | 60 |
| Anesthesiology | 59 |
| Optometrist | 54 |
| General surgery | 48 |
| Mass Immunization Roster Billers | 41 |
| Neurology | 40 |
| Podiatry | 36 |
| Chiropractic | 36 |
| Orthopedic surgery | 34 |
| Anesthesiologist Assistant | 33 |
| Pathology | 33 |
| Gastroenterology | 30 |
| Ophthalmology | 30 |
| Centralized Flu | 28 |
| Certified nurse midwife | 27 |
| Audiologist (billing independently) | 24 |
| Cardiology | 24 |
| Dermatology | 20 |
| Hospitalist | 19 |
| Otolaryngology | 19 |
| Nephrology | 19 |
| Hematology/oncology | 18 |
| Physical medicine and rehabilitation | 17 |
| Urology | 17 |
| Occupational therapist (private practice) | 16 |
| Critical care (intensivists) | 16 |
| Marriage and Family Therapist | 15 |
| Pulmonary disease | 15 |
| Neurosurgery | 14 |
| Pediatric medicine | 13 |
| Rheumatology | 13 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 11 |
| Speech / language pathology | 11 |
| Infectious disease | 11 |
| Vascular surgery | 11 |
| Endocrinology | 10 |
| Radiation oncology | 9 |
| Certified clinical nurse specialist | 8 |
| Plastic and reconstructive surgery | 7 |
| Registered Dietician/Nutrition Professional | 7 |
| Sports Medicine | 6 |
| Pain Management | 6 |
| Hospice and Palliative Care | 6 |
| Interventional Cardiology | 6 |
| Sleep Medicine | 5 |
| General practice | 5 |
| Ambulatory Surgical Center | 5 |
| Geriatric medicine | 4 |
| Thoracic surgery | 4 |
| Opioid Treatment Program | 4 |
| Colorectal surgery (formerly proctology) | 4 |
| Gynecologist/oncologist | 4 |
| Allergy/immunology | 4 |
| Cardiac Electrophysiology | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 3 |
| Surgical oncology | 3 |
| Addiction medicine | 3 |
| General Psychiatry | 2 |
| Interventional Pain Management (IPM) | 2 |
| Hand surgery | 2 |
| Interventional radiology | 2 |
| Portable X-Ray Supplier (Billing Independently) | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Cardiac surgery | 2 |
| Pharmacy | 2 |
| Peripheral vascular disease | 1 |
| Osteopathic manipulative therapy | 1 |
| Dentist | 1 |
| Neuropsychiatry | 1 |
| Medical oncology | 1 |