| Nurse practitioner | 1,060 |
| Physician assistant | 904 |
| Physical therapist (private practice) | 754 |
| Licensed clinical social worker | 674 |
| Internal medicine | 607 |
| Family practice | 562 |
| Certified Registered Nurse Anesthetist (CRNA) | 526 |
| Chiropractic | 368 |
| Mental Health Counselors | 267 |
| Emergency medicine | 233 |
| Clinical psychologist | 214 |
| Obstetrics/gynecology | 208 |
| Diagnostic Radiology | 187 |
| Anesthesiology | 185 |
| Mass Immunization Roster Billers | 162 |
| Psychiatry | 160 |
| Optometrist | 159 |
| Orthopedic surgery | 155 |
| Ophthalmology | 142 |
| Podiatry | 139 |
| Cardiology | 122 |
| General surgery | 109 |
| Neurology | 103 |
| Occupational therapist (private practice) | 103 |
| Dermatology | 95 |
| Gastroenterology | 75 |
| Otolaryngology | 74 |
| Physical medicine and rehabilitation | 73 |
| Urology | 70 |
| Pathology | 66 |
| Pulmonary disease | 63 |
| Hospitalist | 59 |
| Nephrology | 51 |
| Infectious disease | 49 |
| Hematology/oncology | 47 |
| Audiologist (billing independently) | 46 |
| Endocrinology | 40 |
| Pediatric medicine | 40 |
| Ambulatory Surgical Center | 38 |
| Centralized Flu | 34 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 34 |
| Neurosurgery | 33 |
| Speech / language pathology | 31 |
| Allergy/immunology | 29 |
| Radiation oncology | 29 |
| Interventional Cardiology | 29 |
| Plastic and reconstructive surgery | 29 |
| Rheumatology | 29 |
| Pharmacy | 23 |
| Certified nurse midwife | 22 |
| Medical oncology | 21 |
| Pain Management | 18 |
| Thoracic surgery | 17 |
| General practice | 15 |
| Maxillofacial surgery | 15 |
| Oral surgery (dentists only) | 15 |
| Vascular surgery | 15 |
| Colorectal surgery (formerly proctology) | 14 |
| Cardiac Electrophysiology | 11 |
| Interventional radiology | 11 |
| Registered Dietician/Nutrition Professional | 11 |
| Sports Medicine | 10 |
| Geriatric medicine | 10 |
| Hand surgery | 9 |
| Critical care (intensivists) | 7 |
| Clinical Laboratory (Billing Independently) | 7 |
| Osteopathic manipulative therapy | 6 |
| Hematology | 6 |
| Sleep Medicine | 6 |
| Marriage and Family Therapist | 6 |
| Independent Diagnostic Testing Facility (IDTF) | 6 |
| Gynecologist/oncologist | 6 |
| Opioid Treatment Program | 5 |
| Interventional Pain Management (IPM) | 5 |
| Surgical oncology | 4 |
| Cardiac surgery | 4 |
| Epileptologists | 4 |
| Preventive medicine | 3 |
| Nuclear medicine | 3 |
| Certified clinical nurse specialist | 2 |
| Neuropsychiatry | 2 |
| Oral and Maxillofacial Pathology | 2 |
| Home Infusion Therapy Services | 2 |
| Micrographic Dermatologic Surgery | 2 |
| Hospice and Palliative Care | 1 |
| Undersea and Hyperbaric Medicine | 1 |
| Unknown Provider | 1 |
| Dentist | 1 |