Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Naoyuki G Saito, MD, PHD

Radiation Oncology Physician in Indianapolis, IN · enumerated 2005.

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

National Provider Identifier

1558342741

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Registry record

Entity type Individual (Type 1)

Name Naoyuki G Saito

Credential MD, PHD

Sex Male

Practice address 550 University Blvd, Indianapolis, IN, 46202

Phone (317) 944-2524

Enumeration date Nov 7, 2005

Last updated in NPPES Apr 2, 2025

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 235396-1 (NY) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 01076005A (IN) 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
201327810	Medicaid	IN	-
000000965196	Other	IN	ANTHEM PTAN

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

Where does Naoyuki Saito practice?

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

What is the NPI number for Naoyuki Saito?

The National Provider Identifier (NPI) for Naoyuki Saito is 1558342741, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-02.