Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephanie P Chen, MD Inc

Ophthalmology Physician in Los Altos, CA · enumerated 2025 · authorized official Stephanie Chen, Owner.

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

National Provider Identifier

1740155464

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Registry record

Entity type Organization (Type 2)

Legal business name Stephanie P Chen, MD Inc

Practice address 762 Altos Oaks Dr, Los Altos, CA, 94024

Phone (650) 948-9123

Enumeration date Oct 10, 2025

Last updated in NPPES Apr 16, 2026

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Stephanie Chen

Title Owner

Phone (650) 948-9123

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 is Stephanie P Chen, MD Inc located?

The practice location on file with NPPES is in Los Altos, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2026-04-16. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-16.