| Nurse practitioner | 43 |
| Family practice | 29 |
| Physical therapist (private practice) | 28 |
| Chiropractic | 21 |
| Physician assistant | 20 |
| Licensed clinical social worker | 18 |
| Optometrist | 13 |
| Internal medicine | 12 |
| Clinical psychologist | 10 |
| Anesthesiology | 9 |
| Mass Immunization Roster Billers | 9 |
| Mental Health Counselors | 9 |
| Hospitalist | 8 |
| Diagnostic Radiology | 8 |
| Podiatry | 8 |
| Psychiatry | 8 |
| Orthopedic surgery | 8 |
| Emergency medicine | 7 |
| Pediatric medicine | 6 |
| Gastroenterology | 6 |
| Obstetrics/gynecology | 6 |
| Infectious disease | 4 |
| Pulmonary disease | 4 |
| Hematology/oncology | 4 |
| Certified Registered Nurse Anesthetist (CRNA) | 4 |
| Cardiology | 4 |
| Neurology | 4 |
| Certified nurse midwife | 4 |
| Occupational therapist (private practice) | 4 |
| Ophthalmology | 3 |
| Urology | 3 |
| Nephrology | 3 |
| Pathology | 3 |
| Interventional Cardiology | 2 |
| Radiation oncology | 2 |
| General surgery | 2 |
| Marriage and Family Therapist | 2 |
| Sports Medicine | 2 |
| Allergy/immunology | 2 |
| Physical medicine and rehabilitation | 2 |
| Centralized Flu | 2 |
| Interventional radiology | 1 |
| Preventive medicine | 1 |
| Rheumatology | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Oral surgery (dentists only) | 1 |
| Osteopathic manipulative therapy | 1 |
| Critical care (intensivists) | 1 |
| Audiologist (billing independently) | 1 |
| Otolaryngology | 1 |
| Medicare Diabetes Preventive Program | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Sleep Medicine | 1 |
| Pain Management | 1 |
| Endocrinology | 1 |
| Registered Dietician/Nutrition Professional | 1 |