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CHELSEA ALYSE MESFIN LCSW
NPI 1699027441
Social Worker - Clinical in Torrance, CA

Active since October 03, 2012PECOS EnrolledAccepts Medicare Assignment
1000 W CARSON ST, TORRANCE, CA 90502(310) 222-3110(310) 328-7217 Get Directions Write a Review

NPPES record last updated: May 23, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Chelsea Alyse Mesfin Lcsw NPPES

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

CHELSEA ALYSE MESFIN LCSW (NPI 1699027441) is an individual clinical provider in Torrance, California and active in the NPI registry since October 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1699027441
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameCHELSEA ALYSE MESFINCredential: LCSW
Location Address1000 W CARSON STTorrance, CA 90502-2004
Mailing Address1975 Long Beach BlvdLong Beach, CA 90806-5501 · (562) 599-9280
Phone(310) 222-3110
Fax(310) 328-7217
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateOctober 3, 2012
Last NPPES UpdateMay 23, 2024
NPPES CertifiedMay 23, 2024
✔ NPI 1699027441 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.
1000 W CARSON ST, Torrance, CA 90502
Open in Google Maps ↗

Other Names 1

Former Name (1)Chelsea Alyse Warr

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

Chelsea Alyse Mesfin 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 ID4688110372
PECOS Enrollment IDI20240717005197
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 Reassignments

3

Medicare enrollment records show Chelsea Mesfin reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Faculty Physicians And Surgeons Of Llusm
22 mi
Transplant Surgery
1505 WILSON TERRACE, SUITE 155
Glendale, CA 91206
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1508255175 (909) 558-3636
Monica Perlman MD Inc.
90 mi
Primary Care
9850 GENESEE AVE STE 320
La Jolla, CA 92037
  • Reassigned Medicare billing, California enrollment
  • 341 clinicians in this Medicare group
NPI 1134309305 (858) 864-9800
Achievements Unlimited Clinical Psychology Services, Inc.
182 mi
Community/Behavioral Health
512 N COURT ST
Visalia, CA 93291
  • Reassigned Medicare billing, California enrollment
  • 45 clinicians in this Medicare group
NPI 1972953875 (559) 203-3775

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 90502 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.

MISS BRITTANY IRVINE M.A.
Student in an Organized Health Care Education/Training Program
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-2345
DEPAREMENT OF MANTAL HEALTH
Case Management
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-1648
DINA M MEZA
Nurse Practitioner (Family)
1000 W CARSON ST, HEAD AND NECK BOX 6
TORRANCE, CA 90502
Los Angeles County (310) 222-2741
MARIA GUADALUPE VALADEZ
Student in an Organized Health Care Education/Training Program
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (559) 789-1327
ESTEBAN COTA
Specialist
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-2345
MS. DAWN MARIE TLUSTY RN
Registered Nurse (Infusion Therapy)
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-1906
DR. NICOLE MOORE MD
Student in an Organized Health Care Education/Training Program
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-2345
KENTON YUJI SAKURAI
Psychiatry & Neurology (Psychiatry)
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (424) 306-4000

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 Chelsea Mesfin's NPI number?

The NPI number for Chelsea Mesfin is 1699027441. It was assigned to this individual provider in the NPPES registry on October 3, 2012. The provider is also known as Chelsea Alyse Warr.

Where is Chelsea Mesfin located?

Chelsea Mesfin practices at 1000 W Carson St, Torrance, CA 90502. The listed phone number is (310) 222-3110.

What is Chelsea Mesfin's specialty?

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

Is Chelsea Mesfin enrolled in Medicare?

Yes. Chelsea Mesfin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Chelsea Mesfin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chelsea Mesfin reassigns Medicare benefits to 3 organizations: Faculty Physicians And Surgeons Of Llusm (Glendale, CA), Monica Perlman MD Inc. (La Jolla, CA) and Achievements Unlimited Clinical Psychology Services, Inc. (Visalia, CA). Each 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 Chelsea Mesfin'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 Chelsea Mesfin was last updated on May 23, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.