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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

SIENA YCO
NPI 1518877653
Day Training/Habilitation Specialist in San Jose, CA

Active since September 10, 2026
4850 UNION AVE, SAN JOSE, CA 95124(800) 913-2615(408) 559-3158 Get Directions Write a Review

NPPES record added: September 10, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

About Siena Yco NPPES

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

SIENA YCO (NPI 1518877653) is an individual day training/habilitation specialist in San Jose, California and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1518877653
Entity TypeIndividual
Primary Taxonomy373H00000X
Provider Legal NameSIENA YCO
Location Address4850 UNION AVESan Jose, CA 95124-5156
Mailing Address4850 Union AveSan Jose, CA 95124-5156
Phone(800) 913-2615
Fax(408) 559-3158
Sole ProprietorNo
Enumeration DateSeptember 10, 2026
NPPES CertifiedSeptember 10, 2026
✔ NPI 1518877653 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDay Training/Habilitation SpecialistNursing Service Related Providers
Taxonomy Code373H00000X
Definition
Individuals experienced or trained in working with developmentally disabled individuals who need assistance in acquiring and maintaining life skills that enable them to cope more effectively with the demands of independent living.
4850 UNION AVE, San Jose, CA 95124
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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.

JODIE SUGIYAMA GNP
Nurse Practitioner (Gerontology)
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (408) 559-5600
DR. NEAL ELLIOT SLATKIN MD
Psychiatry & Neurology (Neurology)
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (408) 559-5600
LAUREN THOMAS MS, APCC
Counselor (Professional)
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (800) 913-2615
MS. MARY HELEN ZUCCARO FNP-BC
Nurse Practitioner (Family)
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (408) 559-5600
SANJANA RAMAN IYENGAR EMT
Emergency Medical Technician, Basic
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (800) 913-2615
DANA KATHLEEN ELLAZAR ESTIPONA
Marriage & Family Therapist
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (800) 913-2615
AMANDA DUNNING
Marriage & Family Therapist
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (800) 913-2615
YAEL MOSKOWITZ NP
Nurse Practitioner (Psychiatric/Mental Health)
4850 UNION AVE
SAN JOSE, CA 95124
Santa Clara County (800) 913-2615

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 Siena Yco's NPI number?

The NPI number for Siena Yco is 1518877653. It was assigned to this individual provider in the NPPES registry on September 10, 2026.

Where is Siena Yco located?

Siena Yco practices at 4850 Union Ave, San Jose, CA 95124. The listed phone number is (800) 913-2615.

What is Siena Yco's specialty?

The primary specialty registered for this NPI is Day Training/Habilitation Specialist with taxonomy code 373H00000X.

When was this NPI record last updated?

The NPPES record for Siena Yco was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 days 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.