Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Dolly B. Tyan, PH.D.
Specialist in Palo Alto, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1801936471
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Registry record
Entity type Individual (Type 1)
Name Dr. Dolly B. Tyan
Credential PH.D.
Sex Female
Practice address 3373 Hillview Ave, Palo Alto, CA, 94304
Phone (650) 736-8917
Fax (650) 725-4470
Enumeration date Feb 6, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
Frequently asked questions
Where does Dolly Tyan practice?
The practice location on file with NPPES is in Palo Alto, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Dolly Tyan?
The National Provider Identifier (NPI) for Dolly Tyan is 1801936471, a Type 1 (individual) record in the CMS NPPES registry.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.