KARLA ABIGAIL ISLAS-KOSTSZEWA
NPI 1346750650
Social Worker - Clinical in Garden Grove, CA

Q: What is Karla Islas-kostszewa's NPI number?

The NPI number for Karla Islas-kostszewa is 1346750650. It was assigned to this individual provider in the NPPES registry on October 2, 2017.

Q: What is Karla Islas-kostszewa's specialty?

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

Active since October 02, 2017PECOS Enrolled

10331 STANFORD AVE, GARDEN GROVE, CA 92840(714) 663-6000 Get Directions Write a Review

NPPES record last updated: May 18, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 18, 2026, Jun 17, 2025 (2 updates tracked since 2025).

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About Karla Abigail Islas-kostszewa NPPES

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

KARLA ABIGAIL ISLAS-KOSTSZEWA (NPI 1346750650) is an individual clinical provider in Garden Grove, California, licensed in California (96754) and active in the NPI registry since October 2017. She is enrolled in Medicare PECOS and maintains a secondary practice location in Los Alamitos.

NPPES Registry Identity

NPI1346750650

Entity TypeIndividualFemale

Primary Taxonomy1041C0700X

Provider Legal NameKARLA ABIGAIL ISLAS-KOSTSZEWA

Location Address10331 STANFORD AVEGarden Grove, CA 92840-6351

Mailing AddressPo Box 845Los Alamitos, CA 90720-0845 · (949) 385-0092

Phone(714) 663-6000

Sole ProprietorNo

Enumeration DateOctober 2, 2017

Last NPPES UpdateMay 18, 20262 updates tracked since enumeration

NPPES CertifiedMay 18, 2026

✔ NPI 1346750650 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code1041C0700X

License✔ Licensed in CA · 96754

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.

Also ListedCounselor · Mental HealthTaxonomy 101YM0800X

Also ListedSocial WorkerTaxonomy 104100000X · License ASW77339 (CA)

10331 STANFORD AVE, Garden Grove, CA 92840

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Secondary Practice Location 1

Location 1PO Box 845Los Alamitos, CA 90720-0845 · Phone (949) 385-0092

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karla Abigail Islas-kostszewa 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92840 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$0.00 typical visit price

range $62.96 – $187.60

Typical copayment $0.00 (range $15.74 – $46.90)

Most-billed visit code NA

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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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.

JESSICA DINH LCSW

Social Worker (Clinical)