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THOMAS JOSEPH MCMAHON PHD
NPI 1174734438
Psychologist - Clinical Child & Adolescent in New Haven, CT

Active since May 25, 2007
34 PARK ST, CONNECTICUT MENTAL HEALTH CENTER, NEW HAVEN, CT 06519(203) 974-7417(203) 974-7413 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Thomas Joseph Mcmahon Phd NPPES

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

THOMAS JOSEPH MCMAHON PHD (NPI 1174734438) is an individual clinical child & adolescent provider in New Haven, Connecticut, licensed in Connecticut (001969) and active in the NPI registry since May 2007.

NPPES Registry Identity

NPI1174734438
Entity TypeIndividualMale
Primary Taxonomy103TC2200X
Provider Legal NameTHOMAS JOSEPH MCMAHONCredential: PHD
Location Address34 PARK ST, CONNECTICUT MENTAL HEALTH CENTERNew Haven, CT 06519
Mailing Address34 Park St, Connecticut Mental Health Center Office Of Care ManagemNew Haven, CT 06519 · (203) 974-7417 · Fax (203) 974-7413
Phone(203) 974-7417
Fax(203) 974-7413
Sole ProprietorNo
Enumeration DateMay 25, 2007
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1174734438 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologist · Clinical Child & AdolescentBehavioral Health & Social Service Providers
Taxonomy Code103TC2200X
License✔ Licensed in CT · 001969
Definition
A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents.
Also ListedPsychologistTaxonomy 103T00000X · License 001969 (CT)
34 PARK ST, New Haven, CT 06519
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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.

CELESTE ERIKA VALENCIA M.D.
Psychiatry & Neurology (Psychiatry)
34 PARK ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-7158
JEANNE LAURA STEINER DO
Psychiatry & Neurology (Psychiatry)
34 PARK ST, CONNECTICUT MENTAL HEALTH CENTER
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-7417
DR. JOHN R SAKSA PSY.D.
Psychologist (Clinical)
34 PARK ST, RM. B-38
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-7043
DR. VINOD H SRIHARI MD
Psychiatry & Neurology (Psychiatry)
34 PARK ST, CONNECTICUT MENTAL HEALTH CENTER
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-7417
DR. HAGER KORAYM MD
Psychiatry & Neurology (Addiction Psychiatry)
34 PARK ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-7300
JO R KREMER MD
Psychiatry & Neurology (Psychiatry)
34 PARK ST, CONNECTICUT MENTAL HEALTH CENTER
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-7417
ANDREA PATRICIA MENDIOLA IPARRAGUIRRE
Student in an Organized Health Care Education/Training Program
34 PARK ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (475) 217-6217
PAYAL KHENGAR
Student in an Organized Health Care Education/Training Program
34 PARK ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 974-5777

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 Thomas Mcmahon's NPI number?

The NPI number for Thomas Mcmahon is 1174734438. It was assigned to this individual provider in the NPPES registry on May 25, 2007.

Where is Thomas Mcmahon located?

Thomas Mcmahon practices at 34 Park St Connecticut Mental Health Center, New Haven, CT 06519. The listed phone number is (203) 974-7417.

What is Thomas Mcmahon's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical Child & Adolescent, with taxonomy code 103TC2200X.

When was this NPI record last updated?

The NPPES record for Thomas Mcmahon was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.