Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Kenneth Longmuir, MD

Family Medicine Physician in Stanley, ND · enumerated 2009.

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

National Provider Identifier

1326278912

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Registry record

Entity type Individual (Type 1)

Name Mark Kenneth Longmuir

Credential MD

Sex Male

Practice address 615 6th St Se, Stanley, ND, 58784

Phone (701) 628-2424

Fax (701) 628-3274

Enumeration date Jul 17, 2009

Last updated in NPPES Jun 4, 2024

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 12233 (ND) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Longmuir?

The National Provider Identifier (NPI) for Mark Longmuir is 1326278912, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Longmuir practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-04.