Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Annette Shih Mason

Counselor in San Carlos, CA · enumerated 2009.

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

National Provider Identifier

1700019197

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Registry record

Entity type Individual (Type 1)

Name Ms. Annette Shih Mason

Sex Female

Practice address 957 Industrial Rd, Suite B, San Carlos, CA, 94070

Phone (650) 832-6914

Enumeration date Sep 1, 2009

Last updated in NPPES May 28, 2013

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

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

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 Annette Mason?

Annette Mason is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-28.