Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martin Theodore Grune

Urology Physician in Duluth, MN · enumerated 2006.

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

National Provider Identifier

1760411565

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Registry record

Entity type Individual (Type 1)

Name Martin Theodore Grune

Sex Male

Practice address 400 E 3rd St, Duluth, MN, 55805

Phone (218) 786-8364

Enumeration date Jul 2, 2006

Last updated in NPPES May 10, 2011

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 39996 (MN) Primary

Other identifiers

Identifier	Type	State	Issuer
32329100	Medicaid	WI	—
116723500	Medicaid	MN	—

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 1760411565 active?

Yes — as of the latest NPPES snapshot, NPI 1760411565 is active (record last updated 2011-05-10).

How do I verify Martin Grune's NPI record?

Cross-check NPI 1760411565 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-10.