Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Marcus Legan, MD

Diagnostic Radiology Physician in Dyersburg, TN · enumerated 2005.

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

National Provider Identifier

1790779130

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Registry record

Entity type Individual (Type 1)

Name John Marcus Legan

Credential MD

Sex Male

Practice address 400 E Tickle St, Dyersburg, TN, 38024

Phone (731) 285-2346

Enumeration date Aug 31, 2005

Last updated in NPPES Jan 11, 2010

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD25386 (TN) 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
3083641	Medicaid	TN	-

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 John Legan's NPI record?

Cross-check NPI 1790779130 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1790779130 active?

Yes, as of the latest NPPES snapshot, NPI 1790779130 is active (record last updated 2010-01-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-11.