| Nurse practitioner | 912 |
| Certified Registered Nurse Anesthetist (CRNA) | 390 |
| Internal medicine | 296 |
| Physical therapist (private practice) | 278 |
| Physician assistant | 240 |
| Family practice | 169 |
| Anesthesiology | 140 |
| Emergency medicine | 118 |
| Optometrist | 115 |
| Diagnostic Radiology | 110 |
| Obstetrics/gynecology | 95 |
| Orthopedic surgery | 78 |
| Mass Immunization Roster Billers | 74 |
| Neurology | 70 |
| General surgery | 69 |
| Chiropractic | 59 |
| Cardiology | 58 |
| Pulmonary disease | 56 |
| Gastroenterology | 54 |
| Psychiatry | 51 |
| Hospitalist | 49 |
| Ophthalmology | 44 |
| Licensed clinical social worker | 43 |
| Pathology | 43 |
| Clinical psychologist | 40 |
| Dermatology | 40 |
| Hematology/oncology | 38 |
| Occupational therapist (private practice) | 37 |
| Centralized Flu | 37 |
| Mental Health Counselors | 33 |
| Nephrology | 32 |
| Physical medicine and rehabilitation | 32 |
| Urology | 30 |
| Otolaryngology | 30 |
| Infectious disease | 29 |
| Pediatric medicine | 28 |
| Pharmacy | 24 |
| Audiologist (billing independently) | 23 |
| Endocrinology | 22 |
| Rheumatology | 21 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 19 |
| Neurosurgery | 18 |
| Podiatry | 17 |
| Independent Diagnostic Testing Facility (IDTF) | 16 |
| Clinical Laboratory (Billing Independently) | 15 |
| Interventional Cardiology | 13 |
| Radiation oncology | 13 |
| Medical oncology | 12 |
| Cardiac Electrophysiology | 10 |
| Interventional Pain Management (IPM) | 9 |
| Speech / language pathology | 9 |
| Thoracic surgery | 9 |
| Oral surgery (dentists only) | 9 |
| Vascular surgery | 8 |
| Plastic and reconstructive surgery | 8 |
| Sports Medicine | 8 |
| Surgical oncology | 8 |
| Critical care (intensivists) | 8 |
| Ambulatory Surgical Center | 7 |
| Geriatric medicine | 7 |
| Colorectal surgery (formerly proctology) | 7 |
| Allergy/immunology | 5 |
| Hospice and Palliative Care | 5 |
| Cardiac surgery | 4 |
| Opioid Treatment Program | 4 |
| Medical Genetics and Genomics | 3 |
| Gynecologist/oncologist | 3 |
| Interventional radiology | 3 |
| Psychologist (billing independently) | 3 |
| Certified nurse midwife | 3 |
| Hand surgery | 3 |
| Nuclear medicine | 3 |
| Pain Management | 3 |
| Hematopoietic Cell Transplantation and Cellular Therapy | 3 |
| Sleep Medicine | 2 |
| Registered Dietician/Nutrition Professional | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Maxillofacial surgery | 2 |
| Advanced Heart Failure and Transplant Cardiology | 2 |
| General practice | 2 |
| Home Infusion Therapy Services | 2 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Preventive medicine | 1 |
| Portable X-Ray Supplier (Billing Independently) | 1 |
| Certified clinical nurse specialist | 1 |
| Medical Toxicology | 1 |
| Addiction medicine | 1 |
| Unknown Provider | 1 |