Sonia Malka Chessin, LAC, LCSW
Clinical Social Worker · Missoula, MT
Sonia Malka Chessin, LAC, LCSW is a clinical social worker with a practice address in Missoula, Montana, and NPI 1306199336, issued on Oct 15, 2012. Check the license (Montana 1047, as entered in NPPES) with the Montana board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Sonia Malka Chessin
- Credential
- LAC, LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- 1047 MT
1245 MT
Self-reported in NPPES; status is on the state search - Practice location
- 301 W Sussex Ave, Missoula, MT 59801
- Phone
- (406) 370-5308
- Enumerated
- Oct 15, 2012
- Record last updated
- Oct 15, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171120002249); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 1,589 in Montana → Look up another NPI →
Verify Sonia Malka Chessin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 1047Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Sonia Malka Chessin among 1,589 clinical social worker records in Montana
Sonia Malka Chessin, LAC, LCSW is one of 1,589 clinical social worker records with a practice address in Montana. 11% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2012, is newer than 26% of them.
- NPI issued2012 · 26% of these records are older, 70% newer
- In a Medicare fileNo · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 32% of these records are
- Graduated1991 · median 2013 among the 511 with a school on file
- Record last updated2012 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
388 clinical social worker records list a practice address in Missoula
They are 388 of the 3,567 NPPES records with a practice address in Missoula, and 1,589 clinical social worker records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,589 in Montana → Every provider in Missoula → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Daniel Brzozowski, LCSWMissoula, MT 598011124033006
- Mendy Bucy, LCSWMissoula, MT 598011770525115
- Sharon Dillon, LCSWMissoula, MT 598011811902653
- Paul Dokey, LCSWMissoula, MT 598011003975301
- Dana Eisenberg, L.C.S.W.Missoula, MT 598011881643476
- Katherine Florez, MSW LCSWMissoula, MT 598011194839951
- Donald Goeke, PHD, LCSWMissoula, MT 598011184631442
- Bruce Hietala, LCSWMissoula, MT 598011598848608
Common questions
What is Sonia Malka Chessin, LAC, LCSW's NPI number?
Sonia Malka Chessin, LAC, LCSW's National Provider Identifier (NPI) is 1306199336, issued on Oct 15, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Sonia Malka Chessin, LAC, LCSW located?
The NPPES record lists a practice address at 301 W Sussex Ave, Missoula, MT, 59801. Phone: (406) 370-5308. Providers update this record themselves, so call before visiting.
How can I verify Sonia Malka Chessin, LAC, LCSW's license?
NPPES lists Montana license number 1047, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.