Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Linda Kay Vassallo, M.A.
Audiologist in San Mateo, CA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1538448881
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Registry record
Entity type Individual (Type 1)
Name Ms. Linda Kay Vassallo
Credential M.A.
Sex Female
Practice address 100 S Ellsworth Ave Ste 711, San Mateo, CA, 94401
Phone (650) 579-4470
Fax (650) 579-4471
Enumeration date Aug 4, 2011
Last updated in NPPES Jun 2, 2022
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License 1601000582 (MI) Secondary
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Linda Vassallo?
Linda Vassallo is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-02.