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

MARCIA DIANNE LANDAU PHD
NPI 1457263915
Marriage & Family Therapist in West Hills, CA

Q: What is Marcia Landau's NPI number?

The NPI number for Marcia Landau is 1457263915. It was assigned to this individual provider in the NPPES registry on September 21, 2026.

Q: What is Marcia Landau's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Marcia Landau was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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 September 21, 2026

23452 JUSTICE ST, WEST HILLS, CA 91304(805) 857-2355 Get Directions Write a Review

NPPES record added: September 21, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

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About Marcia Dianne Landau Phd NPPES

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

MARCIA DIANNE LANDAU PHD (NPI 1457263915) is an individual marriage & family therapist in West Hills, California, licensed in California (20182) and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1457263915

Entity TypeIndividualFemale

Primary Taxonomy106H00000X

Provider Legal NameMARCIA DIANNE LANDAUCredential: PHD

Location Address23452 JUSTICE STWest Hills, CA 91304-4403

Mailing Address23452 Justice StWest Hills, CA 91304-4403 · (805) 857-2355

Phone(805) 857-2355

Sole ProprietorYes

Enumeration DateSeptember 21, 2026

NPPES CertifiedSeptember 20, 2026

✔ NPI 1457263915 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 · 20182

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.

23452 JUSTICE ST, West Hills, CA 91304

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

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 Marcia Landau's NPI number?

The NPI number for Marcia Landau is 1457263915. It was assigned to this individual provider in the NPPES registry on September 21, 2026.

Where is Marcia Landau located?

Marcia Landau practices at 23452 Justice St, West Hills, CA 91304. The listed phone number is (805) 857-2355.

What is Marcia Landau'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 Marcia Landau was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.