| Nurse practitioner | 422 |
| Internal medicine | 291 |
| Physician assistant | 229 |
| Physical therapist (private practice) | 167 |
| Family practice | 151 |
| Emergency medicine | 107 |
| Licensed clinical social worker | 92 |
| Diagnostic Radiology | 76 |
| Anesthesiology | 71 |
| Obstetrics/gynecology | 68 |
| Mental Health Counselors | 62 |
| General surgery | 53 |
| Certified Registered Nurse Anesthetist (CRNA) | 47 |
| Ophthalmology | 47 |
| Cardiology | 46 |
| Optometrist | 46 |
| Mass Immunization Roster Billers | 43 |
| Podiatry | 37 |
| Hospitalist | 36 |
| Psychiatry | 35 |
| Orthopedic surgery | 35 |
| Nephrology | 34 |
| Pediatric medicine | 33 |
| Registered Dietician/Nutrition Professional | 32 |
| Chiropractic | 32 |
| Gastroenterology | 30 |
| Critical care (intensivists) | 27 |
| Occupational therapist (private practice) | 27 |
| Clinical psychologist | 25 |
| Urology | 25 |
| Ambulatory Surgical Center | 24 |
| Centralized Flu | 22 |
| Endocrinology | 19 |
| Pathology | 19 |
| Vascular surgery | 17 |
| Otolaryngology | 17 |
| Hematology/oncology | 15 |
| Audiologist (billing independently) | 14 |
| Neurology | 14 |
| Physical medicine and rehabilitation | 14 |
| Certified nurse midwife | 13 |
| Neurosurgery | 10 |
| Dermatology | 10 |
| Infectious disease | 10 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 10 |
| Allergy/immunology | 9 |
| Pulmonary disease | 8 |
| Interventional radiology | 7 |
| Pharmacy | 7 |
| Radiation oncology | 7 |
| Speech / language pathology | 7 |
| Plastic and reconstructive surgery | 5 |
| Interventional Pain Management (IPM) | 4 |
| General practice | 4 |
| Geriatric medicine | 4 |
| Pain Management | 3 |
| Interventional Cardiology | 3 |
| Rheumatology | 3 |
| Opioid Treatment Program | 3 |
| Thoracic surgery | 2 |
| Surgical oncology | 2 |
| Medical oncology | 2 |
| Neuropsychiatry | 2 |
| Gynecologist/oncologist | 2 |
| Anesthesiologist Assistant | 2 |
| Sleep Medicine | 2 |
| Cardiac Electrophysiology | 2 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 1 |
| Certified clinical nurse specialist | 1 |
| Colorectal surgery (formerly proctology) | 1 |
| Maxillofacial surgery | 1 |
| Unknown Provider | 1 |
| Peripheral vascular disease | 1 |
| Oral surgery (dentists only) | 1 |
| Nuclear medicine | 1 |
| Sports Medicine | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Cardiac surgery | 1 |
| Marriage and Family Therapist | 1 |
| Hospice and Palliative Care | 1 |
| Home Infusion Therapy Services | 1 |