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

Dr. William G Annan, MD

Individual provider Specialist · NPI 1124010384

Dr. William G Annan, MD is a Specialist in Garden Grove, California. Licensed in California. Registered with an NPI since 2005.

Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

12555 Garden Grove Blvd Ste 302
Garden Grove, CA 92843-1902
Phone: (714) 530-3270
Fax: (714) 530-3278
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence G13787 (CA)

Record details

NPI number1124010384
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 15, 2005
Last updated in NPPESJuly 13, 2026
Mailing address12555 Garden Grove Blvd, Suite 302, Garden Grove, CA 92843-1902

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