Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Alexander F Castellanos MD Inc

Organization Family Medicine Physician · NPI 1831260520

Alexander F Castellanos MD Inc provides Family Medicine Physician services in Templeton, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

699 S Main St Ste A
Templeton, CA 93465-5103
Phone: (805) 434-1804
Fax: (805) 434-1855
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G37303 (CA)

Record details

NPI number1831260520
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Alexander Castellanos — President · (805) 434-1804
Other names Alexander F Castellanos Md; Alexander F Castellanos Md
NPI enumeratedNovember 13, 2006
Last updated in NPPESFebruary 5, 2020
Certification dateFebruary 5, 2020
Mailing address699 S Main St, Ste A, Templeton, CA 93465-5103

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