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

MARK P MASI PSYD
NPI 1992745921
Psychologist - Clinical in Arlington Heights, IL

Q: What is Mark Masi's NPI number?

The NPI number for Mark Masi is 1992745921. It was assigned to this individual provider in the NPPES registry on June 7, 2006.

Q: What is Mark Masi's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: When was this NPI record last updated?

The NPPES record for Mark Masi 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 30 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 June 07, 2006

3295 ARLINGTON HEIGHTS RD, SUITE 114, ARLINGTON HEIGHTS, IL 60004(847) 253-6698 Get Directions Write a Review

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

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About Mark P Masi Psyd NPPES

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

MARK P MASI PSYD (NPI 1992745921) is an individual clinical provider in Arlington Heights, Illinois and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1992745921

Entity TypeIndividualMale

Primary Taxonomy103TC0700X

Provider Legal NameMARK P MASICredential: PSYD

Location Address3295 ARLINGTON HEIGHTS RD, SUITE 114Arlington Heights, IL 60004-1565

Mailing Address3295 Arlington Heights Rd, Suite 114Arlington Heights, IL 60004-1565 · (847) 253-6698

Phone(847) 253-6698

Sole ProprietorNo

Enumeration DateJune 7, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1992745921 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

3295 ARLINGTON HEIGHTS RD, Arlington Heights, IL 60004

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Other Identifiers 1

Other21623208IL · Blue Shield Of Il

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 Mark Masi's NPI number?

The NPI number for Mark Masi is 1992745921. It was assigned to this individual provider in the NPPES registry on June 7, 2006.

Where is Mark Masi located?

Mark Masi practices at 3295 Arlington Heights Rd Suite 114, Arlington Heights, IL 60004. The listed phone number is (847) 253-6698.

What is Mark Masi's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for Mark Masi 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 30 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.