Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Xiuyang Guo

Optometrist in Waterbury, CT · enumerated 2017.

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

National Provider Identifier

1285145508

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Registry record

Entity type Individual (Type 1)

Name Xiuyang Guo

Sex Male

Practice address 87 Grandview Ave, Waterbury, CT, 06708

Phone (203) 805-7022

Enumeration date Oct 12, 2017

Last updated in NPPES Oct 12, 2017

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 3058 (CT) 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

How do I verify Xiuyang Guo's NPI record?

Cross-check NPI 1285145508 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1285145508 active?

Yes, as of the latest NPPES snapshot, NPI 1285145508 is active (record last updated 2017-10-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-12.