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CRISTINA SIERRA LCSW
NPI 1831824333
Social Worker - Clinical in Pasadena, CA

Active since July 19, 2022PECOS Enrolled
393 E WALNUT ST, PASADENA, CA 91188(800) 854-7771 Get Directions Write a Review

NPPES record last updated: December 12, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 12, 2024, Jul 19, 2022 (2 updates tracked since 2022).

About Cristina Sierra Lcsw NPPES

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

CRISTINA SIERRA LCSW (NPI 1831824333) is an individual clinical provider in Pasadena, California, licensed in California (127703) and active in the NPI registry since July 2022. She is enrolled in Medicare PECOS and maintains a secondary practice location in Santa Clarita.

NPPES Registry Identity

NPI1831824333
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameCRISTINA SIERRACredential: LCSW
Location Address393 E WALNUT STPasadena, CA 91188-0001
Mailing Address19713 Azure Field DrSanta Clarita, CA 91321-1346
Phone(800) 854-7771
Sole ProprietorNo
Enumeration DateJuly 19, 2022
Last NPPES UpdateDecember 12, 20242 updates tracked since enumeration
NPPES CertifiedDecember 12, 2024
✔ NPI 1831824333 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · 127703
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.
393 E WALNUT ST, Pasadena, CA 91188
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Secondary Practice Location 1

Location 119713 Azure Field DrSanta Clarita, CA 91321-1346 · Phone (818) 626-4532

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Cristina Sierra Lcsw 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 Cristina Sierra reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Southern California Permanente Medical Group
4.7 mi
Health Maintenance Organization
2626 COLORADO BLVD
Los Angeles, CA 90041
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1013409044 (877) 608-0044

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 91188 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 20

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

MRS. MICHELLE DIAZ LCSW
Social Worker (Clinical)
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (626) 405-6432
SONIA CRISTINA MAYS CNM, WHNP
Midwife
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (626) 405-3224
DR. STEPHEN LUNGWEN SHIH M.D.
Pediatrics
393 E WALNUT ST, 3RD FLOOR PHR SYSTEMS
PASADENA, CA 91188
Los Angeles County (800) 823-2020
MYLENE COOK LCSW
Social Worker (Clinical)
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (800) 464-4000
ABIGAIL COLEMAN FNP-BC
Nurse Practitioner (Family)
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (626) 405-5000
JEREMIAH C BUENROSTRO
Social Worker (Clinical)
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (877) 457-4772
LISET SANDOVAL
Counselor (Mental Health)
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (833) 511-0106
MRS. ALMA DOLAUDY SILVA
Social Worker (Clinical)
393 E WALNUT ST
PASADENA, CA 91188
Los Angeles County (626) 851-1011

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 Cristina Sierra's NPI number?

The NPI number for Cristina Sierra is 1831824333. It was assigned to this individual provider in the NPPES registry on July 19, 2022.

Where is Cristina Sierra located?

Cristina Sierra practices at 393 E Walnut St, Pasadena, CA 91188. The listed phone number is (800) 854-7771.

What is Cristina Sierra's specialty?

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

Is Cristina Sierra enrolled in Medicare?

Yes. Cristina Sierra is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Cristina Sierra's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cristina Sierra reassigns Medicare benefits to Southern California Permanente Medical Group (Los Angeles, 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 Cristina Sierra'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 Cristina Sierra was last updated on December 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.