| Nurse practitioner | 235 |
| Physician assistant | 121 |
| Certified Registered Nurse Anesthetist (CRNA) | 106 |
| Internal medicine | 101 |
| Physical therapist (private practice) | 92 |
| Family practice | 66 |
| Emergency medicine | 44 |
| Licensed clinical social worker | 41 |
| Hospitalist | 41 |
| Chiropractic | 38 |
| Diagnostic Radiology | 37 |
| Mental Health Counselors | 30 |
| Orthopedic surgery | 28 |
| Centralized Flu | 28 |
| Ophthalmology | 27 |
| Cardiology | 26 |
| Anesthesiology | 26 |
| Neurology | 24 |
| Optometrist | 23 |
| Podiatry | 22 |
| Clinical psychologist | 22 |
| Dermatology | 22 |
| Occupational therapist (private practice) | 19 |
| Gastroenterology | 18 |
| Mass Immunization Roster Billers | 18 |
| Obstetrics/gynecology | 18 |
| Ambulatory Surgical Center | 17 |
| General surgery | 15 |
| Psychiatry | 15 |
| Critical care (intensivists) | 14 |
| Urology | 14 |
| Pathology | 14 |
| Speech / language pathology | 12 |
| Physical medicine and rehabilitation | 9 |
| Otolaryngology | 9 |
| Interventional Cardiology | 9 |
| Nephrology | 7 |
| Vascular surgery | 7 |
| Thoracic surgery | 7 |
| General practice | 6 |
| Neurosurgery | 6 |
| Cardiac Electrophysiology | 6 |
| Pulmonary disease | 6 |
| Audiologist (billing independently) | 6 |
| Radiation oncology | 6 |
| Pediatric medicine | 5 |
| Infectious disease | 5 |
| Interventional radiology | 5 |
| Certified nurse midwife | 5 |
| Hematology/oncology | 4 |
| Plastic and reconstructive surgery | 4 |
| Interventional Pain Management (IPM) | 4 |
| Endocrinology | 3 |
| Pharmacy | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Registered Dietician/Nutrition Professional | 3 |
| Pain Management | 3 |
| Rheumatology | 2 |
| Marriage and Family Therapist | 2 |
| Nuclear medicine | 2 |
| Gynecologist/oncologist | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Surgical oncology | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Geriatric medicine | 2 |
| Oral surgery (dentists only) | 2 |
| Allergy/immunology | 2 |
| Clinical Laboratory (Billing Independently) | 2 |
| Preventive medicine | 1 |
| Medical oncology | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Home Infusion Therapy Services | 1 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Medical Genetics and Genomics | 1 |
| Hand surgery | 1 |
| Hospice and Palliative Care | 1 |