KRISTEN IVERS WILLIAMS LCSW
NPI 1265775589
Social Worker - Clinical in Irvine, CA

Q: What is Kristen Williams's NPI number?

The NPI number for Kristen Williams is 1265775589. It was assigned to this individual provider in the NPPES registry on April 4, 2013.

Q: What is Kristen Williams's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Kristen Williams was last updated on October 19, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 April 04, 2013PECOS EnrolledAccepts Medicare Assignment

19742 MACARTHUR BLVD STE 100, IRVINE, CA 92612(714) 646-8034(714) 492-8264 Get Directions Write a Review

NPPES record last updated: October 19, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Kristen Ivers Williams Lcsw NPPES

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

KRISTEN IVERS WILLIAMS LCSW (NPI 1265775589) is an individual clinical provider in Irvine, California, licensed in California (LCSW22291) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in Yorba Linda, and is a graduate of Other (2000).

NPPES Registry Identity

NPI1265775589

Entity TypeIndividualFemale

Primary Taxonomy1041C0700X

Provider Legal NameKRISTEN IVERS WILLIAMSCredential: LCSW

Location Address19742 MACARTHUR BLVD STE 100Irvine, CA 92612-2408

Mailing Address18200 Yorba Linda Blvd Ste 111Yorba Linda, CA 92886-4043

Phone(714) 646-8034

Fax(714) 492-8264

Sole ProprietorYes

Medical School CMSOtherGraduated 2000

Enumeration DateApril 4, 2013

Last NPPES UpdateOctober 19, 2023

NPPES CertifiedFebruary 22, 2021

✔ NPI 1265775589 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code1041C0700X

Licenses✔ Licensed in CA · LCSW22291✔ Licensed in CA · LCS22291

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.

19742 MACARTHUR BLVD STE 100, Irvine, CA 92612

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Secondary Practice Location 1

Location 118200 Yorba Linda Blvd Ste 106Yorba Linda, CA 92886-4006 · Phone (714) 646-8034 · Fax (714) 492-8264

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Kristen Ivers Williams Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID547616278

PECOS Enrollment IDI20231031003531

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 Kristen Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Chiron Psychological, Inc

Same address

Psychologist

19742 MACARTHUR BLVD STE 135
Irvine, CA 92612

Reassigned Medicare billing, California enrollment
15 clinicians in this Medicare group

NPI 1467984377 (714) 646-8034

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92612 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.

Other Providers at the Same Location NPPES 8

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

KIEU BALTHASAR LCSW

Social Worker (Clinical)