Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Gary A Haag, DO

Individual provider Anesthesiology Physician · NPI 1801868237

Gary A Haag, DO is an Anesthesiology Physician in Winchester, Virginia. Licensed in Maryland and Virginia. Registered with an NPI since 2006.

Licensed in
MD, VA
In the registry since
2006
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1840 Amherst St
Winchester, VA 22603
Phone: (540) 536-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence H38515 (MD)
Anesthesiology Physician Taxonomy 207L00000X · Licence 0102201159 (VA)

Record details

NPI number1801868237
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedFebruary 1, 2006
Last updated in NPPESJuly 13, 2026
Certification dateAugust 16, 2022
Mailing addressPo Box 3295, Winchester, VA 22604-2495

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