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MS. SONIA MALKA CHESSIN LAC, LCSW
NPI 1306199336
Social Worker - Clinical in Missoula, MT

Active since October 15, 2012PECOS EnrolledAccepts Medicare Assignment
301 W SUSSEX AVE, MISSOULA, MT 59801(406) 370-5308 Get Directions Write a Review

NPPES record last updated: October 15, 2012. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ms. Sonia Malka Chessin Lac, Lcsw NPPES

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

MS. SONIA MALKA CHESSIN LAC, LCSW (NPI 1306199336) is an individual clinical provider in Missoula, Montana, licensed in Montana (1047) and active in the NPI registry since October 2012. She is enrolled in Medicare PECOS and is a graduate of Other (1991).

NPPES Registry Identity

NPI1306199336
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. SONIA MALKA CHESSINCredential: LAC, LCSW
Location Address301 W SUSSEX AVEMissoula, MT 59801-6840
Mailing Address301 W Sussex AveMissoula, MT 59801-6840 · (406) 370-5308
Phone(406) 370-5308
Sole ProprietorYes
Medical School CMSOtherGraduated 1991
Enumeration DateOctober 15, 2012
✔ NPI 1306199336 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in MT · 1047
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 · Addiction (Substance Use Disorder)Taxonomy 101YA0400X · License 1245 (MT)
301 W SUSSEX AVE, Missoula, MT 59801
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, PacificSource Health Plans.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Sonia Malka Chessin Lac, 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 ID6002173432
PECOS Enrollment IDI20171120002249
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 59801 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 $56.81 – $172.26
Typical copayment $0.00 (range $14.20 – $43.06)
Most-billed visit code NA
Established Patient
$70.82 typical visit price
range $18.24 – $140.32
Typical copayment $17.70 (range $4.56 – $35.08)
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.

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 Sonia Chessin's NPI number?

The NPI number for Sonia Chessin is 1306199336. It was assigned to this individual provider in the NPPES registry on October 15, 2012.

Where is Sonia Chessin located?

Sonia Chessin practices at 301 W Sussex Ave, Missoula, MT 59801. The listed phone number is (406) 370-5308.

What is Sonia Chessin's specialty?

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

Is Sonia Chessin enrolled in Medicare?

Yes. Sonia Chessin 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.

What insurance does Sonia Chessin accept?

Health plans from Blue Cross and Blue Shield of Montana and PacificSource Health Plans list Sonia Chessin as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Sonia Chessin was last updated on October 15, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.