| Nurse practitioner | 326 |
| Licensed clinical social worker | 91 |
| Family practice | 71 |
| Physical therapist (private practice) | 65 |
| Physician assistant | 59 |
| Certified Registered Nurse Anesthetist (CRNA) | 52 |
| Internal medicine | 49 |
| Anesthesiology | 48 |
| Optometrist | 44 |
| Hospitalist | 41 |
| Emergency medicine | 31 |
| Occupational therapist (private practice) | 31 |
| Obstetrics/gynecology | 29 |
| Chiropractic | 25 |
| Diagnostic Radiology | 21 |
| Mass Immunization Roster Billers | 17 |
| Ophthalmology | 16 |
| Pulmonary disease | 16 |
| Orthopedic surgery | 15 |
| Clinical psychologist | 14 |
| Psychiatry | 13 |
| General surgery | 13 |
| Gastroenterology | 13 |
| Neurology | 12 |
| Cardiology | 12 |
| Podiatry | 11 |
| Audiologist (billing independently) | 11 |
| Hematology/oncology | 10 |
| Pathology | 10 |
| Nephrology | 9 |
| Otolaryngology | 9 |
| Urology | 9 |
| Interventional Cardiology | 8 |
| Dermatology | 7 |
| Infectious disease | 6 |
| Pediatric medicine | 6 |
| Physical medicine and rehabilitation | 6 |
| Cardiac Electrophysiology | 5 |
| Pharmacy | 5 |
| Endocrinology | 5 |
| Centralized Flu | 5 |
| Vascular surgery | 4 |
| Geriatric medicine | 4 |
| Rheumatology | 4 |
| Mental Health Counselors | 4 |
| Ambulatory Surgical Center | 3 |
| Neurosurgery | 3 |
| Critical care (intensivists) | 3 |
| Speech / language pathology | 3 |
| Oral surgery (dentists only) | 3 |
| Registered Dietician/Nutrition Professional | 2 |
| Interventional Pain Management (IPM) | 2 |
| Thoracic surgery | 2 |
| Hand surgery | 2 |
| Plastic and reconstructive surgery | 2 |
| Radiation oncology | 2 |
| Certified clinical nurse specialist | 2 |
| Colorectal surgery (formerly proctology) | 2 |
| Allergy/immunology | 2 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 2 |
| Independent Diagnostic Testing Facility (IDTF) | 2 |
| Gynecologist/oncologist | 2 |
| Clinical Laboratory (Billing Independently) | 1 |
| Mammography Screening Center | 1 |
| Opioid Treatment Program | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Medical oncology | 1 |
| Psychologist (billing independently) | 1 |
| Pain Management | 1 |
| Medical Genetics and Genomics | 1 |
| Cardiac surgery | 1 |
| Sleep Medicine | 1 |
| Certified nurse midwife | 1 |
| Hospice and Palliative Care | 1 |