| Nurse practitioner | 488 |
| Physician assistant | 394 |
| Physical therapist (private practice) | 252 |
| Family practice | 175 |
| Internal medicine | 167 |
| Certified Registered Nurse Anesthetist (CRNA) | 162 |
| Anesthesiology | 128 |
| Chiropractic | 89 |
| Emergency medicine | 88 |
| Obstetrics/gynecology | 76 |
| Licensed clinical social worker | 68 |
| Optometrist | 66 |
| Occupational therapist (private practice) | 66 |
| Psychiatry | 66 |
| Diagnostic Radiology | 63 |
| Mental Health Counselors | 62 |
| General surgery | 53 |
| Orthopedic surgery | 45 |
| Mass Immunization Roster Billers | 43 |
| Neurology | 40 |
| Ophthalmology | 40 |
| Hospitalist | 37 |
| Dermatology | 35 |
| Otolaryngology | 35 |
| Cardiology | 34 |
| Clinical psychologist | 33 |
| Pulmonary disease | 33 |
| Gastroenterology | 31 |
| Pathology | 30 |
| Hematology/oncology | 27 |
| Centralized Flu | 27 |
| Speech / language pathology | 26 |
| Physical medicine and rehabilitation | 24 |
| Nephrology | 23 |
| Urology | 22 |
| Rheumatology | 19 |
| Neurosurgery | 17 |
| Pediatric medicine | 17 |
| Podiatry | 17 |
| Audiologist (billing independently) | 16 |
| Endocrinology | 16 |
| Infectious disease | 15 |
| Vascular surgery | 15 |
| Plastic and reconstructive surgery | 14 |
| Ambulatory Surgical Center | 14 |
| Radiation oncology | 13 |
| Interventional Cardiology | 11 |
| Allergy/immunology | 9 |
| Anesthesiologist Assistant | 9 |
| Cardiac Electrophysiology | 9 |
| Registered Dietician/Nutrition Professional | 9 |
| Critical care (intensivists) | 8 |
| Hand surgery | 8 |
| Marriage and Family Therapist | 8 |
| Thoracic surgery | 8 |
| Interventional radiology | 7 |
| Colorectal surgery (formerly proctology) | 7 |
| Clinical Laboratory (Billing Independently) | 6 |
| Medical oncology | 6 |
| Certified nurse midwife | 6 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 6 |
| Pain Management | 6 |
| Advanced Heart Failure and Transplant Cardiology | 5 |
| Oral surgery (dentists only) | 5 |
| Pharmacy | 5 |
| Surgical oncology | 4 |
| Hospice and Palliative Care | 4 |
| Independent Diagnostic Testing Facility (IDTF) | 4 |
| General practice | 4 |
| Cardiac surgery | 3 |
| Gynecologist/oncologist | 3 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 2 |
| Opioid Treatment Program | 2 |
| Sleep Medicine | 2 |
| Interventional Pain Management (IPM) | 2 |
| Unknown Provider | 2 |
| Dentist | 2 |
| Medical Genetics and Genomics | 2 |
| Sports Medicine | 2 |
| Geriatric medicine | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Neuropsychiatry | 1 |
| Oral and Maxillofacial Pathology | 1 |
| Maxillofacial surgery | 1 |
| Osteopathic manipulative therapy | 1 |
| Psychologist (billing independently) | 1 |
| Orofacial Pain | 1 |
| Addiction medicine | 1 |
| Home Infusion Therapy Services | 1 |
| Nuclear medicine | 1 |
| Hematology | 1 |