Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Gertzog

Behavior Analyst in Glenwood Springs, CO · enumerated 2019 · practices at Maura Stack Oden LLC.

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

National Provider Identifier

1104477561

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Registry record

Entity type Individual (Type 1)

Name Margaret Gertzog

Sex Female

Practice address 1309 Oak Way Ave, Glenwood Springs, CO, 81601

Phone (805) 638-9595

Enumeration date Sep 26, 2019

Last updated in NPPES Sep 26, 2019

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers Primary

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 Margaret Gertzog practice?

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

What is the NPI number for Margaret Gertzog?

The National Provider Identifier (NPI) for Margaret Gertzog is 1104477561, 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 2019-09-26.