DIANA ANN SIEW
NPI 1649636820
Marriage & Family Therapist in Los Angeles, CA

Q: What is Diana Siew's NPI number?

The NPI number for Diana Siew is 1649636820. It was assigned to this individual provider in the NPPES registry on January 4, 2016.

Q: What is Diana Siew's specialty?

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

Q: Is Diana Siew enrolled in Medicare?

No. Diana Siew has opted out of Medicare through January 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

Q: When was this NPI record last updated?

The NPPES record for Diana Siew was last updated on April 4, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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 January 04, 2016Opted out of Medicare · through Jan 1, 2028

1849 SAWTELLE BLVD STE 610, LOS ANGELES, CA 90025(424) 442-0266 Get Directions Write a Review

NPPES record last updated: April 4, 2022. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 4, 2022, Mar 1, 2019, Mar 3, 2016 (3 updates tracked since 2016).

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About Diana Ann Siew NPPES

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

DIANA ANN SIEW (NPI 1649636820) is an individual marriage & family therapist in Los Angeles, California, licensed in California (84146) and active in the NPI registry since January 2016. She has opted out of Medicare through January 1, 2028.

NPPES Registry Identity

NPI1649636820

Entity TypeIndividualFemale

Primary Taxonomy106H00000X

Provider Legal NameDIANA ANN SIEW

Location Address1849 SAWTELLE BLVD STE 610Los Angeles, CA 90025-7013

Mailing Address1849 Sawtelle Blvd Ste 610Los Angeles, CA 90025-7013 · (424) 442-0266

Phone(424) 442-0266

Sole ProprietorYes

Enumeration DateJanuary 4, 2016

Last NPPES UpdateApril 4, 20223 updates tracked since enumeration

NPPES CertifiedApril 4, 2022

✔ NPI 1649636820 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 · 84146

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.

1849 SAWTELLE BLVD STE 610, Los Angeles, CA 90025

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Diana Ann Siew has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2024 through January 1, 2028.

Opt-Out Effective DateJanuary 1, 2024

Opt-Out In Effect ThroughJanuary 1, 2028Opt-out affidavits renew automatically every two years unless cancelled

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.

MINKYUNG SO

Marriage & Family Therapist