Illinois NPI Registry — Provider Lookup

Look up NPI numbers for healthcare providers in Illinois. Our latest NPPES snapshot includes 313,809 active providers and organizations with a practice location in Illinois, searchable by name, specialty, and city.

Top specialties in Illinois

Counselor in IL (28,370)
Social Worker in IL (21,942)
Nurse Practitioner in IL (18,067)
Internal Medicine in IL (16,682)
Dentist in IL (15,930)
Physical Therapist in IL (14,146)
Clinic/Center in IL (12,052)
Speech-Language Pathologist in IL (10,850)
Pharmacist in IL (10,711)
Behavior Technician in IL (8,919)
Family Medicine in IL (8,369)
Chiropractor in IL (8,254)
Psychologist in IL (7,782)
Occupational Therapist in IL (7,213)
Student in an Organized Health Care Education/Training Program in IL (7,069)
Physician Assistant in IL (6,233)
Pediatrics in IL (4,962)
Psychiatry & Neurology in IL (4,630)
Registered Nurse in IL (4,494)
Optometrist in IL (4,196)
Emergency Medicine in IL (3,776)
Behavior Analyst in IL (3,439)
Pharmacy in IL (3,353)
Anesthesiology in IL (3,310)
Dietitian, Registered in IL (3,221)
Obstetrics & Gynecology in IL (3,185)
Radiology in IL (3,048)
Durable Medical Equipment & Medical Supplies in IL (2,864)
Developmental Therapist in IL (2,849)
Physical Therapy Assistant in IL (2,678)

Browse by city

Chicago, IL (79,430)
Naperville, IL (6,084)
Springfield, IL (5,826)
Peoria, IL (5,474)
Rockford, IL (4,933)
Evanston, IL (4,817)
Aurora, IL (4,088)
Oak Lawn, IL (3,484)
Arlington Heights, IL (3,468)
Park Ridge, IL (3,077)
Skokie, IL (3,059)
Glenview, IL (3,041)
Oak Park, IL (2,984)
Elgin, IL (2,981)
Champaign, IL (2,938)
Wheaton, IL (2,866)
Joliet, IL (2,843)
Northbrook, IL (2,805)
Maywood, IL (2,686)
Schaumburg, IL (2,584)
Orland Park, IL (2,583)
Downers Grove, IL (2,393)
Bloomington, IL (2,364)
Mchenry, IL (2,058)
Elmhurst, IL (1,967)
Urbana, IL (1,924)
Belleville, IL (1,912)
Decatur, IL (1,882)
Crystal Lake, IL (1,865)
Lombard, IL (1,781)
Des Plaines, IL (1,765)
Libertyville, IL (1,763)
Hoffman Estates, IL (1,735)
Hinsdale, IL (1,663)
Waukegan, IL (1,639)
Plainfield, IL (1,625)
Quincy, IL (1,624)
Tinley Park, IL (1,613)
Marion, IL (1,429)
St Charles, IL (1,372)

Frequently asked questions

How do I look up an NPI number in Illinois?

Use the NPI search and select IL, or browse the specialty and city directories on this page. Every provider profile shows the NPI, taxonomy, practice address, and status.

How many healthcare providers are registered in Illinois?

Our latest NPPES snapshot lists 313,809 active providers and organizations with a practice location in Illinois.

Is this the official Illinois NPI registry?

No — NPI numbers are issued federally by CMS, not by states. This is a private directory built on the public CMS NPPES data file; the official registry is npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-09.