Margot Lassar, LCSW
Clinical Social Worker · Chicago, IL
Margot Lassar, LCSW is a clinical social worker with a practice address in Chicago, Illinois, and NPI 1114340684, issued on Feb 3, 2014. Check the license (Illinois 149016141, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Margot Lassar
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 149016141 IL
Self-reported in NPPES; status is on the state search - Practice location
- 355 E Ohio St, Chicago, IL 60611
- Phone
- (216) 849-6701
- Enumerated
- Feb 3, 2014
- Record last updated
- Feb 3, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 13,637 in Illinois → Look up another NPI →
Also registered at 355 E Ohio St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Walter Hollinger, MDInternal Medicine Physician1750404968
Verify Margot Lassar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 149016141Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Margot Lassar among 13,637 clinical social worker records in Illinois
Margot Lassar, LCSW is one of 13,637 clinical social worker records with a practice address in Illinois. 14% 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 2014, is newer than 38% of them.
- NPI issued2014 · 38% of these records are older, 59% newer
- In a Medicare fileNo · 14% of these records are
- In the CMS Doctors and Clinicians fileNo · 21% of these records are
- Record last updated2014 · 54% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4,368 clinical social worker records list a practice address in Chicago
They are 4,368 of the 63,379 NPPES records with a practice address in Chicago, and 13,637 clinical social worker records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 13,637 in Illinois → Every provider in Chicago → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Diane Breslow, LCSWChicago, IL 606111790750909
- Susan Cornelius, L.C.S.W.Chicago, IL 606111801966700
- Deborah Gessner, MA LCSWChicago, IL 606111861475253
- John Henson, LCSWChicago, IL 606111194838623
- Jeremy Hisaw, LCSWChicago, IL 606111083701429
- Nora Ishibashi, M.S.W., PH.D.Chicago, IL 606111366515124
- Loren Mercola, LCSWChicago, IL 606111437251980
- Hillery Morris, LCSWChicago, IL 606111144339045
Common questions
What is Margot Lassar, LCSW's NPI number?
Margot Lassar, LCSW's National Provider Identifier (NPI) is 1114340684, issued on Feb 3, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Margot Lassar, LCSW located?
The NPPES record lists a practice address at 355 E Ohio St, Chicago, IL, 60611. Phone: (216) 849-6701. Providers update this record themselves, so call before visiting.
How can I verify Margot Lassar, LCSW's license?
NPPES lists Illinois license number 149016141, as entered by the provider. Search the Illinois 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.