Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Sadek

Internal Medicine Physician in Oak Park, IL · enumerated 2020.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1003445222

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Registry record

Entity type Individual (Type 1)

Name Michael Sadek

Sex Male

Practice address 3 Erie Ct Ste L700, Oak Park, IL, 60302

Phone (708) 763-1222

Fax (708) 763-1471

Enumeration date Apr 8, 2020

Last updated in NPPES Oct 27, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 184773 (CA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Michael Sadek?

The National Provider Identifier (NPI) for Michael Sadek is 1003445222, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Sadek practice?

The practice location on file with NPPES is in Oak Park, IL. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-27.