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

DR. KATHERINE ROSE TWOHY PH D
NPI 1316993439
Psychologist - Clinical in Norwalk, CA

Q: What is Katherine Twohy's NPI number?

The NPI number for Katherine Twohy is 1316993439. It was assigned to this individual provider in the NPPES registry on May 26, 2006.

Q: What is Katherine Twohy'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 Katherine Twohy 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 32 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 May 26, 2006

11401 SOUTH BLOOMFIELD AVENUE, NORWALK, CA 90650(562) 863-7011(562) 864-4560 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 Dr. Katherine Rose Twohy Ph D NPPES

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

DR. KATHERINE ROSE TWOHY PH D (NPI 1316993439) is an individual clinical provider in Norwalk, California, licensed in California (PSY15089) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1316993439

Entity TypeIndividualFemale

Primary Taxonomy103TC0700X

Provider Legal NameDR. KATHERINE ROSE TWOHYCredential: PH D

Location Address11401 SOUTH BLOOMFIELD AVENUENorwalk, CA 90650

Mailing Address1600 9th Street, Room 205 Mailstop 2 3Sacramento, CA 95814-6414 · (916) 654-2431 · Fax (916) 654-3186

Phone(562) 863-7011

Fax(562) 864-4560

Sole ProprietorNo

Enumeration DateMay 26, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1316993439 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 CA · PSY15089

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.

11401 SOUTH BLOOMFIELD AVENUE, Norwalk, CA 90650

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