| Nurse practitioner | 313 |
| Physical therapist (private practice) | 100 |
| Certified Registered Nurse Anesthetist (CRNA) | 96 |
| Internal medicine | 82 |
| Physician assistant | 76 |
| Family practice | 62 |
| Chiropractic | 38 |
| Obstetrics/gynecology | 37 |
| Licensed clinical social worker | 34 |
| Emergency medicine | 33 |
| Mass Immunization Roster Billers | 29 |
| Anesthesiology | 27 |
| Optometrist | 25 |
| General surgery | 22 |
| Occupational therapist (private practice) | 21 |
| Diagnostic Radiology | 19 |
| Orthopedic surgery | 18 |
| Ophthalmology | 15 |
| Neurology | 15 |
| Cardiology | 15 |
| Otolaryngology | 14 |
| Mental Health Counselors | 12 |
| Pathology | 12 |
| Psychiatry | 12 |
| Nephrology | 11 |
| Audiologist (billing independently) | 11 |
| Interventional Cardiology | 10 |
| Centralized Flu | 10 |
| Hematology/oncology | 9 |
| Gastroenterology | 9 |
| Dermatology | 9 |
| Pediatric medicine | 9 |
| Urology | 8 |
| Clinical psychologist | 8 |
| Speech / language pathology | 7 |
| Registered Dietician/Nutrition Professional | 7 |
| Pharmacy | 6 |
| Pulmonary disease | 6 |
| Radiation oncology | 6 |
| Hospitalist | 6 |
| Ambulatory Surgical Center | 5 |
| Podiatry | 5 |
| General practice | 4 |
| Physical medicine and rehabilitation | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 4 |
| Allergy/immunology | 4 |
| Clinical Laboratory (Billing Independently) | 4 |
| Sports Medicine | 3 |
| Neurosurgery | 3 |
| Plastic and reconstructive surgery | 3 |
| Portable X-Ray Supplier (Billing Independently) | 3 |
| Pain Management | 3 |
| Vascular surgery | 3 |
| Infectious disease | 3 |
| Rheumatology | 3 |
| Cardiac surgery | 2 |
| Endocrinology | 2 |
| Certified clinical nurse specialist | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Osteopathic manipulative therapy | 2 |
| Cardiac Electrophysiology | 2 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Nuclear medicine | 1 |
| Dentist | 1 |
| Hospice and Palliative Care | 1 |
| Gynecologist/oncologist | 1 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 1 |
| Certified nurse midwife | 1 |
| Home Infusion Therapy Services | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Oral surgery (dentists only) | 1 |
| Epileptologists | 1 |
| Thoracic surgery | 1 |
| Geriatric medicine | 1 |