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DR. GREGORY TIERNEY PHD
NPI 1609949809
Psychologist - Clinical in Sycamore, IL

Active since November 16, 2006
920 S PRAIRIE DR, SUITE F, SYCAMORE, IL 60178(815) 899-0339(815) 899-2098 Get Directions Write a Review

NPPES record last updated: May 23, 2018. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Gregory Tierney Phd NPPES

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

DR. GREGORY TIERNEY PHD (NPI 1609949809) is an individual clinical provider in Sycamore, Illinois, licensed in Illinois (071.006674) and active in the NPI registry since November 2006.

NPPES Registry Identity

NPI1609949809
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. GREGORY TIERNEYCredential: PHD
Location Address920 S PRAIRIE DR, SUITE FSycamore, IL 60178
Mailing Address3498 Sanborn LnDekalb, IL 60115-8304 · (815) 758-3627
Phone(815) 899-0339
Fax(815) 899-2098
Sole ProprietorNo
Enumeration DateNovember 16, 2006
Last NPPES UpdateMay 23, 2018
✔ NPI 1609949809 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in IL · 071.006674
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.
920 S PRAIRIE DR, Sycamore, IL 60178
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica, Quartz.Insurance ›

Other Providers at the Same Location NPPES 2

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

KARYNNA VARGAS
Behavior Analyst
920 S PRAIRIE DR, UNIT G
SYCAMORE, IL 60178
Dekalb County (779) 269-4065
CARI-ANNE RATHBUN RBT
Behavior Technician
920 S PRAIRIE DR, UNIT G
SYCAMORE, IL 60178
Dekalb County (779) 269-4065

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 Gregory Tierney's NPI number?

The NPI number for Gregory Tierney is 1609949809. It was assigned to this individual provider in the NPPES registry on November 16, 2006.

Where is Gregory Tierney located?

Gregory Tierney practices at 920 S Prairie Dr Suite F, Sycamore, IL 60178. The listed phone number is (815) 899-0339.

What is Gregory Tierney's specialty?

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

What insurance does Gregory Tierney accept?

Health plans from Medica and Quartz list Gregory Tierney as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Tierney was last updated on May 23, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.