Leslie Jean Duff, L.C.S.W
Clinical Social Worker · Glen Ellyn, IL
Leslie Jean Duff, L.C.S.W is a clinical social worker with a practice address in Glen Ellyn, Illinois, and NPI 1447593090, issued on Apr 2, 2013. Check the license (Illinois 149014634, 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
- Leslie Jean Duff
- Credential
- L.C.S.W
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 149014634 IL
Self-reported in NPPES; status is on the state search - Practice location
- 460 N Main St, Glen Ellyn, IL 60137
- Phone
- (847) 845-5698
- Enumerated
- Apr 2, 2013
- Record last updated
- Jul 31, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 460 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Alcorn, PSY.D.Clinical Psychologist1700963741
- Seth Allison, LCPCProfessional Counselor1306859582
- Skyler BudnyMental Health Counselor1831061589
- Judith Caribeaux, LCSWClinical Social Worker1750949350
- Caitlin Giammusso, LMFTMental Health Counselor1891591426
- Anna HarcharikMental Health Counselor1174136584
Verify Leslie Jean Duff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 149014634Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47 clinical social worker records list a practice address in Glen Ellyn
They are 47 of the 684 NPPES records with a practice address in Glen Ellyn, 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 47 in Glen Ellyn → All 13,637 in Illinois → Every provider in Glen Ellyn →
Other clinical social worker records in Illinois
- Leah A' Hearn, LCSWSavoy, IL1124790829
- Bruce AaronChicago, IL1013069087
- Melissa Aaron, LCSWWest Frankfort, IL1437505526
- Marcus Abate, MSWAurora, IL1679904767
- Nadia Abbas, LCSWChicago, IL1578176400
- Trisha Abbey, LCSWPalatine, IL1477970176
- Mary Abbott, LCSWElgin, IL1073787685
- Susan Abbott, LCSWOak Park, IL1235456930
- Ghada AbdallaChampaign, IL1235015553
- Samella Abdullah, PH.D.Chicago, IL1356404263
Common questions
What is Leslie Jean Duff, L.C.S.W's NPI number?
Leslie Jean Duff, L.C.S.W's National Provider Identifier (NPI) is 1447593090, issued on Apr 2, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Leslie Jean Duff, L.C.S.W located?
The NPPES record lists a practice address at 460 N Main St, Glen Ellyn, IL, 60137. Phone: (847) 845-5698. Providers update this record themselves, so call before visiting.
How can I verify Leslie Jean Duff, L.C.S.W's license?
NPPES lists Illinois license number 149014634, 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.