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Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.

Allergy Physician in Castro Valley, CA · enumerated 2013 · authorized official Kenneth Lien, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1609210590

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Registry record

Entity type Organization (Type 2)
Legal business name Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.
Practice address 20400 Lake Chabot Rd Ste 304, Castro Valley, CA, 94546
Phone (510) 537-0700
Fax (510) 537-7795
Enumeration date Apr 22, 2013
Last updated in NPPES Feb 3, 2014

Taxonomy & classification

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Kenneth Lien
Title President
Phone (510) 537-0700

Other identifiers

Identifier Type State Issuer
CA110780 Other CA GRP PTAN FOR ALLERGY, ASTHMA & SINUS CENTERS OF SILICON VALLEY

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where is Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. located?
The practice location on file with NPPES is in Castro Valley, CA.
How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-02-03. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-03.