NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Michael S Winston, MD

Anesthesiology Physician in Glendale, CA · enumerated 2006 · practices at Glendale Endoscopy Center, LLC.

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

National Provider Identifier

1003895822

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Registry record

Entity type Individual (Type 1)
Name Michael S Winston
Credential MD
Sex Male
Practice address Glendale, CA, 91206
Phone (818) 500-0523
Enumeration date Jan 11, 2006
Last updated in NPPES Oct 12, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License G20812 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Michael Winston?
The National Provider Identifier (NPI) for Michael Winston is 1003895822, a Type 1 (individual) record in the CMS NPPES registry.
Where does Michael Winston practice?
The practice location on file with NPPES is in Glendale, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-12.