Provider Profile

Katharine Costello, LMFT

Unclaimed Profile

About Katharine Costello

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Specialty

Marriage & Family Therapist (Primary)

Credentials & Licensing

CA license165040
NPI1457269508
NPI issued08/31/2026

License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.

Common questions

What kind of doctor is Katharine Costello?

Katharine Costello is a marriage and family therapist in Tustin, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Marriage & Family Therapist”.

NPI registry

What is Katharine Costello's address?

Katharine Costello is listed at 232 W Main St Ste 103, Tustin, CA 92780. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

How can I make an appointment with Katharine Costello?

The number on file is (714) 584-9345. Guide.md cannot book appointments or pass on messages — please call the office directly.

NPI registry

What is Katharine Costello's NPI number?

Katharine Costello's National Provider Identifier is 1457269508. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.

NPI registry

Has Katharine Costello confirmed this information?

Not yet. This profile is built from public federal data and has not been confirmed by Katharine Costello. If this is you, claiming it is free.

Guide.md

Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.