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Dr. Diane Lynn Chau, MD

Internal Medicine Physician in Long Beach, CA · enumerated 2006.

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

National Provider Identifier

1780609834

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Registry record

Entity type Individual (Type 1)
Name Dr. Diane Lynn Chau
Credential MD
Sex Female
Practice address 200 Oceangate Ste 100, Long Beach, CA, 90802
Phone (888) 562-5442
Enumeration date Jul 12, 2006
Last updated in NPPES Aug 24, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 9807 (HI) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A65089 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

What is the NPI number for Diane Chau?
The National Provider Identifier (NPI) for Diane Chau is 1780609834, a Type 1 (individual) record in the CMS NPPES registry.
Where does Diane Chau practice?
The practice location on file with NPPES is in Long Beach, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-24.