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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

KATHARINE COSTELLO LMFT
NPI 1457269508
Marriage & Family Therapist in Tustin, CA

Active since August 31, 2026
232 W MAIN ST STE 103, TUSTIN, CA 92780(714) 584-9345 Get Directions Write a Review

NPPES record added: August 31, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

About Katharine Costello Lmft NPPES

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

KATHARINE COSTELLO LMFT (NPI 1457269508) is an individual marriage & family therapist in Tustin, California, licensed in California (165040) and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1457269508
Entity TypeIndividualFemale
Primary Taxonomy106H00000X
Provider Legal NameKATHARINE COSTELLOCredential: LMFT
Location Address232 W MAIN ST STE 103Tustin, CA 92780-7712
Mailing Address3943 Irvine Blvd # 426Irvine, CA 92602-2400
Phone(714) 584-9345
Sole ProprietorYes
Enumeration DateAugust 31, 2026
NPPES CertifiedAugust 31, 2026
✔ NPI 1457269508 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
License✔ Licensed in CA · 165040
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
232 W MAIN ST STE 103, Tustin, CA 92780
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Other Providers at the Same Location NPPES 8

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

MRS. MAURA LYNCH-LOFTUS LCSW
Social Worker (Clinical)
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (714) 324-3786
COURTNEY SHEN PSYCHOLOGY, INC.
Clinic/Center (Mental Health (Including Community Mental Health Center))
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (714) 462-3108
PAOLA MARIA ABICIC
Marriage & Family Therapist
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (949) 204-0101
LINH COLLEEN BLACKNEY
Marriage & Family Therapist
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (714) 869-1639
GROWING SIDEWAYS COUNSELING INC
Marriage & Family Therapist
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (714) 869-1639
VAN T NGUYEN
Social Worker (Clinical)
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (310) 874-7386
ALYSSA PHILLIPS AMFT
Marriage & Family Therapist
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (714) 869-1639
WEISENBURGER INC.
Marriage & Family Therapist
232 W MAIN ST STE 103
TUSTIN, CA 92780
Orange County (949) 610-0858

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 Katharine Costello's NPI number?

The NPI number for Katharine Costello is 1457269508. It was assigned to this individual provider in the NPPES registry on August 31, 2026.

Where is Katharine Costello located?

Katharine Costello practices at 232 W Main St Ste 103, Tustin, CA 92780. The listed phone number is (714) 584-9345.

What is Katharine Costello's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

When was this NPI record last updated?

The NPPES record for Katharine Costello was last updated on August 31, 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.