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

DR. MICHAEL E. MAHON PSY.D., LPC
NPI 1588999643
Counselor - Professional in Creve Coeur, MO

Q: What is Michael Mahon's NPI number?

The NPI number for Michael Mahon is 1588999643. It was assigned to this individual provider in the NPPES registry on October 7, 2009.

Q: What is Michael Mahon's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

Q: When was this NPI record last updated?

The NPPES record for Michael Mahon was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since October 07, 2009

644 OFFICE PKWY, CREVE COEUR, MO 63141(314) 910-0758 Get Directions Write a Review

NPPES record last updated: August 24, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 24, 2026, Jul 10, 2024 (2 updates tracked since 2024).

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About Dr. Michael E. Mahon Psy.d., Lpc NPPES

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

DR. MICHAEL E. MAHON PSY.D., LPC (NPI 1588999643) is an individual professional provider in Creve Coeur, Missouri, licensed in Missouri (2024023876) and active in the NPI registry since October 2009.

NPPES Registry Identity

NPI1588999643

Entity TypeIndividualMale

Primary Taxonomy101YP2500X

Provider Legal NameDR. MICHAEL E. MAHONCredential: PSY.D., LPC

Location Address644 OFFICE PKWYCreve Coeur, MO 63141-7103

Mailing Address644 Office PkwyCreve Coeur, MO 63141-7103 · (314) 910-0758

Phone(314) 910-0758

Sole ProprietorYes

Enumeration DateOctober 7, 2009

Last NPPES UpdateAugust 24, 20262 updates tracked since enumeration

NPPES CertifiedAugust 24, 2026

✔ NPI 1588999643 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · ProfessionalBehavioral Health & Social Service Providers

Taxonomy Code101YP2500X

License✔ Licensed in MO · 2024023876

644 OFFICE PKWY, Creve Coeur, MO 63141

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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 Michael Mahon's NPI number?

The NPI number for Michael Mahon is 1588999643. It was assigned to this individual provider in the NPPES registry on October 7, 2009.

Where is Michael Mahon located?

Michael Mahon practices at 644 Office Pkwy, Creve Coeur, MO 63141. The listed phone number is (314) 910-0758.

What is Michael Mahon's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

When was this NPI record last updated?

The NPPES record for Michael Mahon was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.