| Nurse practitioner | 407 |
| Physician assistant | 363 |
| Physical therapist (private practice) | 221 |
| Certified Registered Nurse Anesthetist (CRNA) | 215 |
| Internal medicine | 190 |
| Family practice | 179 |
| Licensed clinical social worker | 159 |
| Emergency medicine | 84 |
| Mental Health Counselors | 71 |
| Clinical psychologist | 67 |
| Obstetrics/gynecology | 60 |
| Mass Immunization Roster Billers | 59 |
| Chiropractic | 58 |
| Orthopedic surgery | 55 |
| Diagnostic Radiology | 52 |
| Anesthesiology | 52 |
| Optometrist | 49 |
| General surgery | 40 |
| Psychiatry | 39 |
| Occupational therapist (private practice) | 35 |
| Cardiology | 32 |
| Pulmonary disease | 29 |
| Ophthalmology | 26 |
| Gastroenterology | 25 |
| Dermatology | 25 |
| Neurology | 24 |
| Audiologist (billing independently) | 23 |
| Speech / language pathology | 20 |
| Podiatry | 18 |
| Registered Dietician/Nutrition Professional | 18 |
| Hematology/oncology | 18 |
| Pathology | 17 |
| Physical medicine and rehabilitation | 17 |
| Otolaryngology | 16 |
| Pediatric medicine | 16 |
| Urology | 15 |
| Centralized Flu | 13 |
| Hospitalist | 12 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 12 |
| Rheumatology | 12 |
| Infectious disease | 11 |
| Vascular surgery | 9 |
| Radiation oncology | 9 |
| Sports Medicine | 9 |
| Endocrinology | 8 |
| General practice | 8 |
| Pharmacy | 8 |
| Opioid Treatment Program | 8 |
| Neurosurgery | 7 |
| Allergy/immunology | 7 |
| Interventional Cardiology | 7 |
| Plastic and reconstructive surgery | 6 |
| Ambulatory Surgical Center | 6 |
| Nephrology | 6 |
| Clinical Laboratory (Billing Independently) | 5 |
| Interventional radiology | 5 |
| Cardiac Electrophysiology | 5 |
| Independent Diagnostic Testing Facility (IDTF) | 5 |
| Certified nurse midwife | 5 |
| Geriatric medicine | 4 |
| Medical oncology | 4 |
| Cardiac surgery | 4 |
| Critical care (intensivists) | 4 |
| Gynecologist/oncologist | 4 |
| Hand surgery | 3 |
| Marriage and Family Therapist | 3 |
| Pain Management | 3 |
| Osteopathic manipulative therapy | 3 |
| Colorectal surgery (formerly proctology) | 2 |
| Interventional Pain Management (IPM) | 2 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Preventive medicine | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Surgical oncology | 1 |
| Hematology | 1 |
| Addiction medicine | 1 |
| Unknown Provider | 1 |
| Hospice and Palliative Care | 1 |
| General Psychiatry | 1 |