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MARGARET SIDUN
NPI 1962209270
Counselor - Addiction (Substance Use Disorder) in San Mateo, CA

Active since February 26, 2025
2251 PALM AVE, SAN MATEO, CA 94403(650) 513-6500 Get Directions Write a Review

NPPES record last updated: February 26, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Margaret Sidun NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARGARET SIDUN (NPI 1962209270) is an individual addiction (substance use disorder) provider in San Mateo, California and active in the NPI registry since February 2025.

NPPES Registry Identity

NPI1962209270
Entity TypeIndividualFemale
Primary Taxonomy101YA0400X
Provider Legal NameMARGARET SIDUN
Location Address2251 PALM AVESan Mateo, CA 94403-1814
Mailing Address211 Irving StSan Mateo, CA 94402-2221 · (650) 705-7592
Phone(650) 513-6500
Sole ProprietorYes
Enumeration DateFebruary 26, 2025
NPPES CertifiedFebruary 25, 2025
✔ NPI 1962209270 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
2251 PALM AVE, San Mateo, CA 94403
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BILL HADDOCK
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6500
MARICELA CALVILLO
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE, 2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6503
MICHAEL LEWIS ZUMKELLER R1592701224
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (209) 273-6265
JOHN MICHAEL MEDINA JR.
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6500
MS. ABBY LUCE
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6503
AMY FRANKEN SUDRC 17921
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6500
ALYSSA CHANELLE ZARAGOZA LVN
Licensed Vocational Nurse
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6500
RAFAEL FLORES
Counselor (Addiction (Substance Use Disorder))
2251 PALM AVE
SAN MATEO, CA 94403
San Mateo County (650) 513-6500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margaret Sidun's NPI number?

The NPI number for Margaret Sidun is 1962209270. It was assigned to this individual provider in the NPPES registry on February 26, 2025.

Where is Margaret Sidun located?

Margaret Sidun practices at 2251 Palm Ave, San Mateo, CA 94403. The listed phone number is (650) 513-6500.

What is Margaret Sidun's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Margaret Sidun was last updated on February 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.