Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Huan Guan, O.D.
Optometrist in Davis, CA · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336379247
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Registry record
Entity type Individual (Type 1)
Name Huan Guan
Credential O.D.
Sex Female
Practice address 1 Shields Ave, Davis, CA, 95616
Phone (530) 752-2300
Enumeration date Jul 27, 2009
Last updated in NPPES Feb 13, 2020
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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
Is NPI 1336379247 active?
Yes, as of the latest NPPES snapshot, NPI 1336379247 is active (record last updated 2020-02-13).
How do I verify Huan Guan's NPI record?
Cross-check NPI 1336379247 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-13.