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

Ya-Shu Liang, PH.D.

Counseling Psychologist in Tustin, CA · enumerated 2010 · practices at Haynes Psychological Services, Inc..

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

National Provider Identifier

1043534035

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Registry record

Entity type Individual (Type 1)

Name Ya-Shu Liang

Credential PH.D.

Sex Female

Practice address Tustin, CA, 92780

Phone (714) 494-7479

Enumeration date Mar 18, 2010

Last updated in NPPES Mar 18, 2010

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

Taxonomy & licenses

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License PSY 22323 (CA) Primary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License PSY 017443 (NY) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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 Ya-Shu Liang?

Ya-Shu Liang is registered in NPPES with the primary taxonomy of Counseling Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Shirley Liao Clinical Psychologist · Tustin, CA NPI 1902931108 Haynes Psychological Services, Inc. Community/Behavioral Health Agency · Tustin, CA NPI 1265647770 Michael Simmons Clinical Social Worker · Tustin, CA NPI 1740481423 Daniel Garcia Clinical Social Worker · Tustin, CA NPI 1205074804 Jane Lee Clinical Social Worker · Tustin, CA NPI 1144500521

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-18.