NPI Lookup Illinois — Find IL Healthcare Providers

About Illinois Healthcare Providers in NPPES

The NPPES registry contains approximately 88,000 active NPI records for Illinois healthcare providers. These include individual practitioners (physicians, nurses, dentists, therapists, and more) and organizational providers (hospitals, group practices, clinics, and pharmacies). Major healthcare institutions in Illinois include Northwestern Medicine, Rush University Medical Center, Advocate Aurora Health, UChicago Medicine. Provider records are updated by providers themselves within 30 days of any change, and the registry is refreshed daily.

How to Find an NPI Number in Illinois

The search tool above is pre-filtered to show Illinois providers by default. Enter a provider's last name in the "By Provider Name" tab for the fastest results. For specific providers, entering both first and last name narrows results quickly. To find hospitals, clinics, or pharmacies operating in Illinois, use the "By Organization" tab and enter the facility or practice name. To look up a known NPI number and verify it belongs to a Illinois provider, use the "By NPI Number" tab.

Illinois Healthcare Provider Overview

Healthcare in Illinois is served by a network of providers across major cities including Chicago, Aurora, Naperville, Rockford, Springfield. Illinois providers span all medical specialties — from primary care physicians and family medicine to specialized surgical centers, behavioral health providers, and long-term care facilities. All providers who accept insurance, bill Medicare or Medicaid, or participate in electronic health record systems are listed in the NPPES NPI registry with active NPI records.

Illinois Medical Board

The Illinois Medical Licensing Board is the state regulatory authority that issues and oversees medical licenses in Illinois. For license status verification, disciplinary actions, and medical board certification, visit the official website at https://idfpr.illinois.gov/profs/MedicalLicensing.asp. While this NPI lookup tool confirms a provider's federal NPPES enrollment, state license verification through the Illinois Medical Licensing Board is a separate but equally important step in complete provider credential verification. Both NPPES and state board data should be checked during credentialing workflows.

Common Healthcare Specialties in Illinois

Healthcare providers in Illinois cover the full spectrum of medical specialties. The most commonly registered specialties in the NPPES registry for Illinois include internal medicine, family medicine, general surgery, pediatrics, obstetrics and gynecology, cardiology, orthopedics, psychiatry, neurology, and radiology. Illinois also has significant numbers of advanced practice nurses (NPs, CRNAs, CNMs), physician assistants, physical therapists, occupational therapists, and clinical psychologists — all of whom have NPI records in NPPES.

NPI Lookup for Illinois Medicaid and Medicare

Verifying NPI enrollment for Illinois providers who participate in state Medicaid or federal Medicare programs requires checking multiple databases. This NPPES tool provides the foundational identity verification. For Illinois Medicaid enrollment, check with the state Medicaid agency directly. For Medicare enrollment, use the CMS PECOS system (see our PECOS NPI Lookup tool). For DEA prescribing authority verification for Illinois providers, see our DEA License Lookup by NPI tool.

Related Illinois Healthcare Resources

Additional resources for Illinois provider verification: the Illinois Medical Licensing Board at https://idfpr.illinois.gov/profs/MedicalLicensing.asp for license verification; the OIG LEIE exclusion database at oig.hhs.gov for Medicaid/Medicare exclusion checks; the National Practitioner Data Bank (NPDB) for malpractice and disciplinary history; and CMS Medicare Physician Compare for Medicare enrollment verification. Using all these resources together constitutes a comprehensive provider credential verification process.

Frequently Asked Questions — Illinois NPI Lookup

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