| Nurse practitioner | 190 |
| Physician assistant | 116 |
| Internal medicine | 92 |
| Family practice | 80 |
| Emergency medicine | 58 |
| Certified Registered Nurse Anesthetist (CRNA) | 58 |
| Physical therapist (private practice) | 54 |
| Mass Immunization Roster Billers | 25 |
| Mental Health Counselors | 24 |
| Anesthesiology | 23 |
| Occupational therapist (private practice) | 21 |
| Chiropractic | 20 |
| Licensed clinical social worker | 19 |
| Gastroenterology | 17 |
| Psychiatry | 17 |
| Obstetrics/gynecology | 17 |
| General surgery | 16 |
| Optometrist | 16 |
| Diagnostic Radiology | 15 |
| Nephrology | 15 |
| Neurology | 14 |
| Pediatric medicine | 14 |
| Clinical psychologist | 14 |
| Orthopedic surgery | 13 |
| Cardiology | 13 |
| Ophthalmology | 12 |
| Otolaryngology | 12 |
| Critical care (intensivists) | 10 |
| Podiatry | 9 |
| Pulmonary disease | 7 |
| Ambulatory Surgical Center | 7 |
| Centralized Flu | 6 |
| Vascular surgery | 6 |
| Pathology | 5 |
| Dermatology | 5 |
| Infectious disease | 5 |
| Interventional Cardiology | 5 |
| Urology | 5 |
| Pharmacy | 5 |
| Hospitalist | 5 |
| Allergy/immunology | 4 |
| Audiologist (billing independently) | 4 |
| Endocrinology | 4 |
| General practice | 3 |
| Speech / language pathology | 3 |
| Interventional radiology | 3 |
| Physical medicine and rehabilitation | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Cardiac Electrophysiology | 3 |
| Plastic and reconstructive surgery | 3 |
| Certified clinical nurse specialist | 3 |
| Oral surgery (dentists only) | 3 |
| Neurosurgery | 2 |
| Anesthesiologist Assistant | 2 |
| Certified nurse midwife | 2 |
| Unknown Provider | 2 |
| Surgical oncology | 2 |
| Opioid Treatment Program | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Pain Management | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Hematology/oncology | 2 |
| Addiction medicine | 2 |
| Micrographic Dermatologic Surgery | 1 |
| Unknown physician specialty | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Marriage and Family Therapist | 1 |
| Hospice and Palliative Care | 1 |
| Preventive medicine | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Medical Genetics and Genomics | 1 |
| Geriatric medicine | 1 |
| Gynecologist/oncologist | 1 |
| Home Infusion Therapy Services | 1 |
| Medical oncology | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Public Health or Welfare Agencies (Federal, State, and local) | 1 |
| Radiation oncology | 1 |
| Nuclear medicine | 1 |
| Interventional Pain Management (IPM) | 1 |
| Rheumatology | 1 |