| Nurse practitioner | 1,204 |
| Physician assistant | 1,075 |
| Certified Registered Nurse Anesthetist (CRNA) | 483 |
| Family practice | 413 |
| Physical therapist (private practice) | 379 |
| Internal medicine | 343 |
| Emergency medicine | 236 |
| Hospitalist | 212 |
| Obstetrics/gynecology | 198 |
| Licensed clinical social worker | 198 |
| Chiropractic | 181 |
| Anesthesiology | 163 |
| Optometrist | 154 |
| Diagnostic Radiology | 146 |
| Mass Immunization Roster Billers | 139 |
| Mental Health Counselors | 131 |
| Orthopedic surgery | 118 |
| Psychiatry | 103 |
| General surgery | 96 |
| Cardiology | 91 |
| Occupational therapist (private practice) | 83 |
| Neurology | 79 |
| Hematology/oncology | 66 |
| Gastroenterology | 62 |
| Centralized Flu | 59 |
| Clinical psychologist | 57 |
| Ophthalmology | 57 |
| Audiologist (billing independently) | 53 |
| Dermatology | 53 |
| Pathology | 48 |
| Pulmonary disease | 46 |
| Physical medicine and rehabilitation | 45 |
| Otolaryngology | 41 |
| Podiatry | 41 |
| Certified nurse midwife | 37 |
| Urology | 35 |
| Registered Dietician/Nutrition Professional | 35 |
| Speech / language pathology | 32 |
| Nephrology | 32 |
| Endocrinology | 31 |
| Pediatric medicine | 29 |
| Rheumatology | 29 |
| Infectious disease | 25 |
| Neurosurgery | 21 |
| Medical oncology | 21 |
| Plastic and reconstructive surgery | 20 |
| Ambulatory Surgical Center | 19 |
| Radiation oncology | 19 |
| Allergy/immunology | 18 |
| Hospice and Palliative Care | 17 |
| Interventional Cardiology | 17 |
| Critical care (intensivists) | 15 |
| Vascular surgery | 14 |
| Cardiac Electrophysiology | 13 |
| Pharmacy | 12 |
| Pain Management | 10 |
| Thoracic surgery | 10 |
| Hand surgery | 9 |
| Marriage and Family Therapist | 9 |
| Independent Diagnostic Testing Facility (IDTF) | 9 |
| Sports Medicine | 8 |
| Advanced Heart Failure and Transplant Cardiology | 8 |
| Hematology | 8 |
| Opioid Treatment Program | 8 |
| General practice | 8 |
| Clinical Laboratory (Billing Independently) | 8 |
| Interventional Pain Management (IPM) | 7 |
| Geriatric medicine | 7 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 6 |
| Gynecologist/oncologist | 6 |
| Micrographic Dermatologic Surgery | 6 |
| Surgical oncology | 5 |
| Psychologist (billing independently) | 5 |
| Sleep Medicine | 5 |
| Colorectal surgery (formerly proctology) | 4 |
| Cardiac surgery | 4 |
| Dentist | 4 |
| Interventional radiology | 4 |
| Oral surgery (dentists only) | 3 |
| Undersea and Hyperbaric Medicine | 2 |
| Maxillofacial surgery | 2 |
| Home Infusion Therapy Services | 2 |
| Mammography Screening Center | 1 |
| Addiction medicine | 1 |
| Anesthesiologist Assistant | 1 |
| Neuropsychiatry | 1 |
| Medical Toxicology | 1 |
| Single or Multispecialty Clinic or Group Practice | 1 |
| Preventive medicine | 1 |
| Unknown Provider | 1 |
| Certified clinical nurse specialist | 1 |