Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen Greenstein

Pulmonary Disease Physician in Streamwood, IL · enumerated 2006.

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

National Provider Identifier

1801820618

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Registry record

Entity type Individual (Type 1)

Name Stephen Greenstein

Sex Male

Practice address 77 E Irving Park Rd, Streamwood, IL, 60107

Phone (630) 830-7400

Enumeration date Jul 10, 2006

Last updated in NPPES Sep 5, 2012

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 036051551 (IL) Primary

Other identifiers

Identifier	Type	State	Issuer
036051551	Medicaid	IL	-

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.

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Frequently asked questions

What is the NPI number for Stephen Greenstein?

The National Provider Identifier (NPI) for Stephen Greenstein is 1801820618, a Type 1 (individual) record in the CMS NPPES registry.

Where does Stephen Greenstein practice?

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

Other providers at this practice address

Browse all →

A. G. Lung Associates, P.C. Pulmonary Disease Physician · Streamwood, IL NPI 1437189644 Kirit Patari Family Medicine Physician · Streamwood, IL NPI 1740376763 Health Care Associates of Streamwood Family Medicine Physician · Streamwood, IL NPI 1619187895 Kiran Patari General Practice Dentistry · Streamwood, IL NPI 1730373671

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-05.