NPPES file of Aug 9, 2026

Doctors and health care providers in Illinois

241,958 individual NPPES records list a practice address in Illinois, 1,928 per 100,000 residents, below the 2,176 across the 50 states and D.C.; records with an MD or DO credential: 387 per 100,000, against 375 nationally. Licenses are checked on the Illinois Department of Financial and Professional Regulation search.

CMS NPPES registry, file of Aug 9, 2026; HHS-OIG LEIE of Sep 10, 2026; 2023 Census estimates · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).
Illinois license search Illinois Department of Financial and Professional Regulation: the official search for a license's status and public orders. How to verify a Illinois license

Internal Medicine is Illinois's largest physician specialty

52,045 records in Illinois list a physician taxonomy (allopathic or osteopathic, NUCC 207 and 208) as their primary type. The eight largest specialties, each linked to its Illinois list:

  1. Internal Medicine7,238
  2. Family Medicine6,215
  3. Emergency Medicine3,291
  4. Pediatrics3,176
  5. Anesthesiology2,575
  6. Psychiatry2,147
  7. Obstetrics & Gynecology2,062
  8. Diagnostic Radiology1,874

Source: CMS NPPES flagged primary taxonomy, physician codes 207 and 208, file of Aug 9, 2026.

Across every provider type, Clinical Social Worker is the largest group

  1. Clinical Social Worker13,637
  2. Physical Therapist12,045
  3. Mental Health Counselor10,716
  4. Speech-Language Pathologist10,224
  5. Pharmacist9,744
  6. Professional Counselor9,508
  7. Behavior Technician9,340
  8. Family Nurse Practitioner7,639

Chicago has the most records

  1. Chicago63,379
  2. Springfield4,997
  3. Naperville4,634
  4. Peoria4,621
  5. Evanston4,013
  6. Rockford3,893
  7. Aurora3,342
  8. Oak Lawn2,993

Source: CMS NPPES primary taxonomy and practice city, file of Aug 9, 2026.

What's distinctive here

The specialties Illinois has more, and fewer, of than the nation

Relative to its size, Illinois has about 2× the national share of professional counselors and only 0.49× the share of behavior technicians. These gaps reflect how each state licenses and classifies professions, not how much care is available.

More common in Illinois

Less common in Illinois

Each multiple is Illinois's share of that specialty divided by its national share, among specialties with at least 3,000 providers in-state. Source: CMS NPPES, current release.

2,395 Illinois entries on the federal exclusion list

19.1 per 100,000 residents, against 25 for the 50 states and D.C. The most common reason in Illinois: license revoked, suspended or surrendered. Excluded people and businesses cannot bill Medicare or Medicaid. How to check a provider →

  1. License revoked, suspended or surrendered888
  2. Conviction for a program-related crime853
  3. Felony conviction for health care fraud173
  4. Excluded under another health care program132
  5. Conviction for patient abuse or neglect101

Source: HHS-OIG List of Excluded Individuals/Entities (LEIE), file of Sep 10, 2026 (oig.hhs.gov), entries with a Illinois address, five most common authorities.

The 30 Illinois cities with the most records

  1. Chicago63,379
  2. Springfield4,997
  3. Naperville4,634
  4. Peoria4,621
  5. Evanston4,013
  6. Rockford3,893
  7. Aurora3,342
  8. Oak Lawn2,993
  9. Arlington Heights2,697
  10. Park Ridge2,577
  11. Maywood2,572
  12. Glenview2,545
  13. Wheaton2,468
  14. Champaign2,445
  15. Oak Park2,307
  16. Elgin2,268
  17. Northbrook2,226
  18. Skokie2,210
  19. Joliet2,047
  20. Orland Park1,925
  21. Schaumburg1,911
  22. Bloomington1,903
  23. Downers Grove1,899
  24. McHenry1,852
  25. Urbana1,744
  26. Elmhurst1,540
  27. Decatur1,513
  28. Crystal Lake1,442
  29. Belleville1,404
  30. Libertyville1,361

Common questions

How many healthcare providers are in Illinois?

241,958 individual NPPES records list a practice address in Illinois, under 612 provider taxonomy codes. A record is a registration, not a license: it includes clinicians, technicians and students in training.

What is the most common physician specialty in Illinois?

Internal Medicine, with 7,238 records, followed by family medicine (6,215). Across every provider type the largest group is Clinical Social Worker (13,637 records).

How do I find a doctor in Illinois?

Open a physician specialty above for its Illinois list and its cities, or search a name or NPI with the state set to IL. PlainDoctor does not filter by insurance or rate doctors; check the license on the state board before booking.

The largest states

  1. California974,315
  2. New York545,291
  3. Florida470,495
  4. Texas433,013
  5. Ohio327,042

All states →

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); 2023 Census population estimates. Records are self-reported registrations, not licenses; PlainDoctor does not rate or recommend providers; its rankings sort billing figures, not quality.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.