Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Weldon John Mallgren, D.O.

Psychiatry Physician in Claremore, OK · enumerated 2006.

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

National Provider Identifier

1841384021

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Registry record

Entity type Individual (Type 1)

Name Weldon John Mallgren

Credential D.O.

Sex Male

Practice address 17599 S Highway 88, Claremore, OK, 74017

Phone (918) 342-9530

Fax (918) 342-9533

Enumeration date Oct 3, 2006

Last updated in NPPES Mar 1, 2011

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 2466 (OK) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
100227390C	Medicaid	OK	-

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

Where does Weldon Mallgren practice?

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

What is the NPI number for Weldon Mallgren?

The National Provider Identifier (NPI) for Weldon Mallgren is 1841384021, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-01.