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Justin James Chau, M.D.

Hematology & Oncology Physician in Grafton, WI · enumerated 2015 · practices at Aurora Medical Center Grafton.

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

National Provider Identifier

1871974154

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Registry record

Entity type Individual (Type 1)
Name Justin James Chau
Credential M.D.
Sex Male
Practice address 975 Port Washington Rd, Grafton, WI, 53024
Enumeration date Jun 12, 2015
Last updated in NPPES May 5, 2026

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD-45076 (IA) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD-45076 (IA) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 82045 (WI) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD-45076 (IA) Secondary
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
100236288 Medicaid WI -

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 Justin Chau's NPI record?
Cross-check NPI 1871974154 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1871974154 active?
Yes, as of the latest NPPES snapshot, NPI 1871974154 is active (record last updated 2026-05-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-05.