Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DONNA J. MAHNEN LCSW
NPI 1215929385
Social Worker - Clinical in Denver, CO

Active since August 16, 2005
1405 FEDERAL BLVD, DENVER, CO 80204(303) 504-1500(303) 825-1711 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Donna J. Mahnen Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DONNA J. MAHNEN LCSW (NPI 1215929385) is an individual clinical provider in Denver, Colorado, licensed in Colorado (992535) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1215929385
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameDONNA J. MAHNENCredential: LCSW
Location Address1405 FEDERAL BLVDDenver, CO 80204-2211
Mailing Address4141 E Dickenson PlDenver, CO 80222-6012 · (303) 504-6509 · Fax (303) 782-0916
Fax(303) 825-1711
Sole ProprietorNo
Enumeration DateAugust 16, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1215929385 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in CO · 992535
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
1405 FEDERAL BLVD, Denver, CO 80204

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Social Worker (Clinical)
1405 FEDERAL BLVD
DENVER, CO 80204
Registered Nurse
1405 FEDERAL BLVD
DENVER, CO 80204
Interpreter
1405 FEDERAL BLVD
DENVER, CO 80204
Counselor (Professional)
1405 FEDERAL BLVD
DENVER, CO 80204
Counselor
1405 FEDERAL BLVD
DENVER, CO 80204
Case Manager/Care Coordinator
1405 FEDERAL BLVD
DENVER, CO 80204
Counselor (Professional)
1405 FEDERAL BLVD
DENVER, CO 80204
Social Worker (Clinical)
1405 FEDERAL BLVD
DENVER, CO 80204

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Donna Mahnen's NPI number?

The NPI number for Donna Mahnen is 1215929385. It was assigned to this individual provider in the NPPES registry on August 16, 2005.

Where is Donna Mahnen located?

Donna Mahnen practices at 1405 Federal Blvd, Denver, CO 80204. The listed phone number is (303) 504-1500.

What is Donna Mahnen's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Donna Mahnen was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.