Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Shirley Woo Sigmund, M.A.

Speech-Language Pathologist in Atascadero, CA · enumerated 2008.

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

National Provider Identifier

1578709549

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mrs. Shirley Woo Sigmund

Credential M.A.

Sex Female

Practice address Atascadero, CA, 93422

Phone (805) 468-2000

Enumeration date Dec 22, 2008

Last updated in NPPES Jul 8, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 7747 (CA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Shirley Sigmund practice?

The practice location on file with NPPES is in Atascadero, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Shirley Sigmund?

The National Provider Identifier (NPI) for Shirley Sigmund is 1578709549, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-08.