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MS. ALEXANDRA BEATRIZ SILIEZAR MFT
NPI 1881746568
Marriage & Family Therapist in Greenbrae, CA

Active since January 16, 2007PECOS Enrolled
250 BON AIR ROAD, GREENBRAE, CA 94904(415) 499-6666(415) 507-2672 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ms. Alexandra Beatriz Siliezar Mft NPPES

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

MS. ALEXANDRA BEATRIZ SILIEZAR MFT (NPI 1881746568) is an individual marriage & family therapist in Greenbrae, California, licensed in California (MFC 38249) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1881746568
Entity TypeIndividualFemale
Primary Taxonomy106H00000X
Provider Legal NameMS. ALEXANDRA BEATRIZ SILIEZARCredential: MFT
Location Address250 BON AIR ROADGreenbrae, CA 94904
Mailing Address250 Bon Air RoadGreenbrae, CA 94904 · (415) 499-6666 · Fax (415) 507-2672
Phone(415) 499-6666
Fax(415) 507-2672
Sole ProprietorNo
Enumeration DateJanuary 16, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1881746568 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 · MFC 38249
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.
250 BON AIR ROAD, Greenbrae, CA 94904
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Alexandra Beatriz Siliezar Mft is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alexandra Siliezar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Marin
Same address
Mental Health (Including Community Mental Health Center)
250 BON AIR
Greenbrae, CA 94904
  • Reassigned Medicare billing, California enrollment
  • 34 clinicians in this Medicare group
NPI 1568525699 (415) 473-7818

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 7

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

MARIN MEDICAL LABORATORIES
Pathology (Anatomic Pathology & Clinical Pathology)
250 BON AIR ROAD
GREENBRAE, CA 94904
Marin County (415) 925-7174
MARIN MEDICAL LABORATORIES
Pathology (Anatomic Pathology & Clinical Pathology)
250 BON AIR ROAD
GREENBRAE, CA 94904
Marin County (415) 925-7174
SOUND INPATIENT PHYSICIANS MEDICAL GROUP, INC.
Hospitalist
250 BON AIR ROAD
GREENBRAE, CA 94904
Marin County (415) 925-7000
DR. ROBERT COHEN MD
Nuclear Medicine
250 BON AIR ROAD
GREENBRAE, CA 94904
Marin County (415) 925-7174
DR. IMOK CHA MD
Pathology (Anatomic Pathology & Clinical Pathology)
250 BON AIR ROAD
GREENBRAE, CA 94904
Marin County (415) 925-7174
MS. CHRISTIAN ANN BALLANCE RN
Registered Nurse
250 BON AIR ROAD, UNIT B
GREENBRAE, CA 94904
Marin County (415) 473-6793
MS. ELSA O NG MFT
Marriage & Family Therapist
250 BON AIR ROAD
GREENBRAE, CA 94904
Marin County (415) 499-6830

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 Alexandra Siliezar's NPI number?

The NPI number for Alexandra Siliezar is 1881746568. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Where is Alexandra Siliezar located?

Alexandra Siliezar practices at 250 Bon Air Road, Greenbrae, CA 94904. The listed phone number is (415) 499-6666.

What is Alexandra Siliezar's specialty?

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

Is Alexandra Siliezar enrolled in Medicare?

Yes. Alexandra Siliezar is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexandra Siliezar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Siliezar reassigns Medicare benefits to County Of Marin (Greenbrae, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alexandra Siliezar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alexandra Siliezar was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.