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

Sidney M Marchasin MD Inc

Organization Preferred Provider Organization · NPI 1285915082

Sidney M Marchasin MD Inc is a Preferred Provider Organization in Redwood City, California. Licensed in California. Registered with an NPI since 2011.

Licensed in
CA
In the registry since
2011
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

39 Birch St Ste C
Redwood City, CA 94062-1482
Phone: (650) 363-8352
Fax: (650) 363-8438
Show map & directions

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

Specialties & licences

Preferred Provider Organization (primary) Taxonomy 305R00000X · Licence A19161 (CA)

Record details

NPI number1285915082
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Sidney Marchasin — Medical Doctor · (650) 363-8352
NPI enumeratedSeptember 7, 2011
Last updated in NPPESSeptember 7, 2011
Mailing address39 Birch St, Suite C, Redwood City, CA 94062