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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Christine Martin, RN

Registered Nurse in Duluth, MN · enumerated 2008.

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

National Provider Identifier

1821234139

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Registry record

Entity type Individual (Type 1)
Name Catherine Christine Martin
Credential RN
Sex Female
Practice address 525 S Lake Ave, Suite 218, Duluth, MN, 55802
Phone (218) 740-1174
Enumeration date Dec 17, 2008
Last updated in NPPES Dec 17, 2008

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License R 117073-5 (MN) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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 NPI 1821234139 active?
Yes, as of the latest NPPES snapshot, NPI 1821234139 is active (record last updated 2008-12-17).
How do I verify Catherine Martin's NPI record?
Cross-check NPI 1821234139 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 2008-12-17.