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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. ALEXANDRA GUTTMANN WALKER MSN, PMHNP-BC, CRNP
NPI 1336442151
Nurse Practitioner - Psychiatric/Mental Health in Bethesda, MD

Active since December 16, 2010
8008 WESTOVER RD, BETHESDA, MD 20814(301) 646-5748 Get Directions Write a Review

NPPES record last updated: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 30, 2026, Mar 17, 2018, Nov 15, 2017 and 1 more (4 updates tracked since 2015).

About Mrs. Alexandra Guttmann Walker Msn, Pmhnp-bc, Crnp NPPES

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

MRS. ALEXANDRA GUTTMANN WALKER MSN, PMHNP-BC, CRNP (NPI 1336442151) is an individual psychiatric/mental health provider in Bethesda, Maryland, licensed in Maryland (R216406) and active in the NPI registry since December 2010.

NPPES Registry Identity

NPI1336442151
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameMRS. ALEXANDRA GUTTMANN WALKERCredential: MSN, PMHNP-BC, CRNP
Location Address8008 WESTOVER RDBethesda, MD 20814-1147
Mailing Address8008 Westover RdBethesda, MD 20814-1147
Phone(301) 646-5748
Sole ProprietorYes
Enumeration DateDecember 16, 2010
Last NPPES UpdateSeptember 30, 20264 updates tracked since enumeration
NPPES CertifiedSeptember 30, 2026
✔ NPI 1336442151 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in MD · R216406
Also ListedRegistered NurseTaxonomy 163W00000X · License RN1038374 (DC)
8008 WESTOVER RD, Bethesda, MD 20814
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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 Walker's NPI number?

The NPI number for Alexandra Walker is 1336442151. It was assigned to this individual provider in the NPPES registry on December 16, 2010.

Where is Alexandra Walker located?

Alexandra Walker practices at 8008 Westover Rd, Bethesda, MD 20814. The listed phone number is (301) 646-5748.

What is Alexandra Walker's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

When was this NPI record last updated?

The NPPES record for Alexandra Walker was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.