Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Catherine Anne Layden, CNT, MNT

Nutritionist in Denver, CO · enumerated 2013.

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

National Provider Identifier

1235550237

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Registry record

Entity type Individual (Type 1)

Name Ms. Catherine Anne Layden

Credential CNT, MNT

Sex Female

Practice address 400 E 3rd Ave, #1001, Denver, CO, 80203

Phone (303) 722-7698

Enumeration date Dec 18, 2013

Last updated in NPPES Sep 16, 2015

Taxonomy & licenses

133N00000X Nutritionist Dietary & Nutritional Service Providers Primary

133NN1002X Nutrition Education Nutritionist Dietary & Nutritional Service Providers Secondary

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 Catherine Layden practice?

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

What is the NPI number for Catherine Layden?

The National Provider Identifier (NPI) for Catherine Layden is 1235550237, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-16.