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

Gary Duane Maas, OD

Individual provider Optometrist · NPI 1003960048

Gary Duane Maas, OD is an Optometrist in Vallejo, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

675 Sereno Dr
Vallejo, CA 94589
Phone: (707) 651-2990
Fax: (707) 651-2948
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence OPT5904T (CA)

Record details

NPI number1003960048
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedJanuary 23, 2007
Last updated in NPPESJuly 8, 2007
Mailing address975 Sereno Dr, Vallejo, CA 94589-2441

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