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

Margaret Sidun

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1962209270

Margaret Sidun is an Addiction (Substance Use Disorder) Counselor in San Mateo, California. Practices as a sole proprietor. Registered with an NPI since 2025.

In the registry since
2025

Practice location Address checks out

2251 Palm Ave
San Mateo, CA 94403-1814
Phone: (650) 513-6500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X

Record details

NPI number1962209270
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedFebruary 26, 2025
Last updated in NPPESFebruary 26, 2025
Certification dateFebruary 25, 2025
Mailing address211 Irving St, San Mateo, CA 94402-2221

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