Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alvin Y Au, MD FACG

Gastroenterology Physician in Hanford, CA · enumerated 2006.

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

National Provider Identifier

1477639193

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Alvin Y Au

Credential MD FACG

Sex Male

Practice address 1360 Bailey Dr, Hanford, CA, 93230

Phone (559) 584-6499

Fax (559) 584-8124

Enumeration date Oct 27, 2006

Last updated in NPPES Mar 10, 2015

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License A45911 (CA) Primary

207RI0008X Hepatology Physician Allopathic & Osteopathic Physicians · License A45911 (CA) Secondary

Other identifiers

Identifier	Type	State	Issuer
00A459110	Medicaid	CA	-

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

Is NPI 1477639193 active?

Yes, as of the latest NPPES snapshot, NPI 1477639193 is active (record last updated 2015-03-10).

How do I verify Alvin Au's NPI record?

Cross-check NPI 1477639193 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-03-10.