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

Kay Wen Chang, MD

Pediatric Otolaryngology Physician in Palo Alto, CA · enumerated 2007.

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

National Provider Identifier

1649318577

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Registry record

Entity type Individual (Type 1)

Name Kay Wen Chang

Credential MD

Sex Male

Practice address Palo Alto, CA, 94304

Phone (650) 497-8000

Enumeration date Feb 2, 2007

Last updated in NPPES Apr 28, 2024

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

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License G85741 (CA) Secondary

207YP0228X Pediatric Otolaryngology Physician Allopathic & Osteopathic Physicians · License G85741 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00G857410	Other	CA	MEDICAL RENDERING ID #

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 NPI 1649318577 active?

Yes, as of the latest NPPES snapshot, NPI 1649318577 is active (record last updated 2024-04-28).

How do I verify Kay Chang's NPI record?

Cross-check NPI 1649318577 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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Fred Laningham Pediatric Radiology Physician · Palo Alto, CA NPI 1962405753 David Ansel Developmental - Behavioral Pediatrics Physician · Palo Alto, CA NPI 1376547612 Allen Eskenazi Pediatrics Physician · Palo Alto, CA NPI 1487658332 Mohamed Hasan Neonatal-Perinatal Medicine Physician · Palo Alto, CA NPI 1538164470 Erin Holsinger Pediatrics Physician · Palo Alto, CA NPI 1003817347 Francisco Alvarez Hospitalist Physician · Palo Alto, CA NPI 1174525612 Katayoon Shahinfar Pediatrics Physician · Palo Alto, CA NPI 1700874559 Veronica Rooks Pediatric Radiology Physician · Palo Alto, CA NPI 1457341935

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-28.