| Nurse practitioner | 758 |
| Physician assistant | 250 |
| Certified Registered Nurse Anesthetist (CRNA) | 238 |
| Family practice | 234 |
| Internal medicine | 225 |
| Emergency medicine | 123 |
| Mental Health Counselors | 120 |
| Licensed clinical social worker | 91 |
| Mass Immunization Roster Billers | 87 |
| Chiropractic | 86 |
| Physical therapist (private practice) | 86 |
| Clinical psychologist | 81 |
| Obstetrics/gynecology | 78 |
| Optometrist | 71 |
| Psychiatry | 66 |
| Orthopedic surgery | 58 |
| General surgery | 54 |
| Diagnostic Radiology | 54 |
| Anesthesiology | 50 |
| Cardiology | 43 |
| Podiatry | 43 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 41 |
| Neurology | 38 |
| Ophthalmology | 35 |
| Gastroenterology | 32 |
| Audiologist (billing independently) | 26 |
| Dermatology | 23 |
| Certified clinical nurse specialist | 23 |
| Critical care (intensivists) | 21 |
| Pulmonary disease | 21 |
| Occupational therapist (private practice) | 21 |
| Urology | 20 |
| Otolaryngology | 19 |
| Pediatric medicine | 18 |
| Hematology/oncology | 18 |
| Endocrinology | 18 |
| Nephrology | 17 |
| Centralized Flu | 17 |
| Hospitalist | 17 |
| Pathology | 17 |
| Speech / language pathology | 16 |
| Infectious disease | 16 |
| Physical medicine and rehabilitation | 15 |
| Vascular surgery | 13 |
| Neurosurgery | 12 |
| Hospice and Palliative Care | 11 |
| Plastic and reconstructive surgery | 11 |
| Geriatric medicine | 11 |
| Rheumatology | 10 |
| Sports Medicine | 10 |
| Hand surgery | 9 |
| Cardiac Electrophysiology | 8 |
| Ambulatory Surgical Center | 8 |
| Radiation oncology | 8 |
| Certified nurse midwife | 8 |
| Colorectal surgery (formerly proctology) | 8 |
| Interventional Cardiology | 7 |
| Allergy/immunology | 7 |
| Gynecologist/oncologist | 6 |
| Pain Management | 6 |
| Registered Dietician/Nutrition Professional | 6 |
| Thoracic surgery | 5 |
| Interventional radiology | 5 |
| Opioid Treatment Program | 4 |
| Addiction medicine | 4 |
| Medical oncology | 4 |
| Clinical Laboratory (Billing Independently) | 3 |
| Cardiac surgery | 3 |
| Sleep Medicine | 2 |
| Pharmacy | 2 |
| Marriage and Family Therapist | 2 |
| Surgical oncology | 2 |
| Interventional Pain Management (IPM) | 2 |
| Unknown Provider | 2 |
| Advanced Heart Failure and Transplant Cardiology | 1 |
| Micrographic Dermatologic Surgery | 1 |
| Unknown physician specialty | 1 |
| Maxillofacial surgery | 1 |
| General practice | 1 |
| Anesthesiologist Assistant | 1 |
| Dentist | 1 |
| Hematology | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |