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Gary A Haag, DO

Anesthesiology Physician in Winchester, VA · enumerated 2006.

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

National Provider Identifier

1801868237

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Registry record

Entity type Individual (Type 1)
Name Gary A Haag
Credential DO
Sex Male
Practice address 1840 Amherst St, Winchester, VA, 22603
Phone (540) 536-8000
Enumeration date Feb 1, 2006
Last updated in NPPES Aug 16, 2022

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License H38515 (MD) Primary
207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 0102201159 (VA) Secondary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
005708257 Medicaid VA -

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

Where does Gary Haag practice?
The practice location on file with NPPES is in Winchester, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gary Haag?
The National Provider Identifier (NPI) for Gary Haag is 1801868237, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-16.