Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Samuel Poriza Au, M.D.

Q: What is the NPI number for Samuel Au?

The National Provider Identifier (NPI) for Samuel Au is 1578565420, a Type 1 (individual) record in the CMS NPPES registry.

Radiation Oncology Physician in Springfield, IL · enumerated 2005.

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

National Provider Identifier

1578565420

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Registry record

Entity type Individual (Type 1)

Name Samuel Poriza Au

Credential M.D.

Sex Male

Practice address 301 N 8th St, Springfield, IL, 62701

Phone (217) 525-5666

Fax (217) 757-6754

Enumeration date Aug 11, 2005

Last updated in NPPES Oct 19, 2015

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 35081855 (OH) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 036117479 (IL) Primary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 13493 (NV) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License ME114482 (FL) 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
007934500	Medicaid	FL	-
543382	Medicaid	AZ	-
880457	Other	NV	USA MCO
1624235	Other	NV	GHI
P00885629	Other	NV	RAILROAD MEDICARE
1578565420	Medicaid	NV	-
2368816	Medicaid	OH	-
6054447	Other	NV	CIGNA
GV509Z	Other	FL	MEDICARE

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

What is the NPI number for Samuel Au?

The National Provider Identifier (NPI) for Samuel Au is 1578565420, a Type 1 (individual) record in the CMS NPPES registry.

Where does Samuel Au practice?

The practice location on file with NPPES is in Springfield, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-19.