Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John T Leininger, MD

Urology Physician in Cleveland, OH · enumerated 2006.

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

National Provider Identifier

1447278635

Verified

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Registry record

Entity type Individual (Type 1)

Name John T Leininger

Credential MD

Sex Male

Practice address 11100 Euclid Ave, Cleveland, OH, 44106

Phone (216) 844-5661

Fax (216) 286-6341

Enumeration date Jul 17, 2006

Last updated in NPPES May 20, 2008

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 35-031829 (OH) 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
000000257638	Other	OH	ANTHEM
1900975	Other	OH	UHC
4562788	Other	OH	AETNA
000000507514	Other	OH	ANTHEM
363755	Other	OH	WELLCARE
P00358807	Other	OH	RAILROAD MEDICARE
0197031	Medicaid	OH	-
741853	Other	OH	BUCKEYE
000000221212	Other	OH	UNISON

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is John Leininger?

John Leininger is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-20.