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IRMA SOMMERFELD LICENSED CLINICAL SOCIAL WORKER A PROFESSIONAL CORP
NPI 1821663543
Social Worker - Clinical in Westlake Village, CA

Active since May 25, 2021
650 HAMPSHIRE RD STE 200, WESTLAKE VILLAGE, CA 91361(805) 794-0743 Get Directions Write a Review

NPPES record last updated: September 15, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 15, 2025, Sep 12, 2025, Sep 6, 2022 and 2 more (5 updates tracked since 2021).

About Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp NPPES

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

IRMA SOMMERFELD LICENSED CLINICAL SOCIAL WORKER A PROFESSIONAL CORP (NPI 1821663543) is a healthcare organization registered as a clinical in Westlake Village, California and active in the NPI registry since May 2021. The organization lists Irma Sommerfeld, Clinical Social Worker, as its authorized official.

NPPES Registry Identity

NPI1821663543
Entity TypeOrganization
Primary Taxonomy1041C0700X
Legal Business NameIRMA SOMMERFELD LICENSED CLINICAL SOCIAL WORKER A PROFESSIONAL CORP
Location Address650 HAMPSHIRE RD STE 200Westlake Village, CA 91361-2540
Mailing Address650 Hampshire Rd Ste 200Thousand Oaks, CA 91361-2540 · (805) 794-0743
Phone(805) 794-0743
Organization SubpartNo
Authorized OfficialIrma SommerfeldClinical Social Worker · (805) 794-0743
Enumeration DateMay 25, 2021
Last NPPES UpdateSeptember 15, 20255 updates tracked since enumeration
NPPES CertifiedSeptember 15, 2025
✔ NPI 1821663543 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
650 HAMPSHIRE RD STE 200, Westlake Village, CA 91361
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp, which bills Medicare for the services this clinician delivers.

Clinician (1)

Irma Sommerfeld, MSW
Clinical Social Worker
NPI 1396190187
650 HAMPSHIRE RD STE 200
Westlake Village, CA 91361
(805) 601-6700
✔ PECOSSame address

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

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 Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp's NPI number?

The NPI number for Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp is 1821663543. It was assigned to this organization in the NPPES registry on May 25, 2021.

Where is Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp located?

Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp is located at 650 Hampshire Rd Ste 200, Westlake Village, CA 91361. The listed phone number is (805) 794-0743.

What is Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp enrolled in Medicare?

Yes. Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Social Worker) reassigns their Medicare billing to Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Irma Sommerfeld Licensed Clinical Social Worker A Professional Corp was last updated on September 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.