Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Loretta N Markus

Psychologist in Appleton, WI · enumerated 2013.

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

National Provider Identifier

1427495829

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Registry record

Entity type Individual (Type 1)

Name Loretta N Markus

Sex Female

Practice address 4321 W College Ave Ste 200, Appleton, WI, 54914

Phone (920) 916-0730

Enumeration date May 28, 2013

Last updated in NPPES Jan 29, 2023

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 3907-57 (WI) 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.

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Frequently asked questions

Is NPI 1427495829 active?

Yes, as of the latest NPPES snapshot, NPI 1427495829 is active (record last updated 2023-01-29).

How do I verify Loretta Markus's NPI record?

Cross-check NPI 1427495829 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 2023-01-29.