Nancy J. Leff, LCSW
Social Worker · Madison, WI
Nancy J. Leff, LCSW is a social worker with a practice address in Madison, Wisconsin, and NPI 1124073499, issued on May 24, 2006. Check the license (Wisconsin 2401-123, as entered in NPPES) with the Wisconsin board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Nancy J. Leff
- Credential
- LCSW
- Primary taxonomy
- Social Worker 104100000X
- License number
- 2401-123 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2709 Marshall CT, Madison, WI 53705
- Phone
- (608) 231-3191
- Enumerated
- May 24, 2006
- Record last updated
- Jan 23, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (608) 231-3108
- Medicaid ID
- 39669800 WI
- Entity
- Type 1 · individual
Also registered at 2709 Marshall CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy FeingoldClinical Social Worker1073597399
- Kim Jorgensen, LCSWClinical Social Worker1487661906
Verify Nancy J. Leff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2401-123Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
337 social worker records list a practice address in Madison
They are 337 of the 15,014 NPPES records with a practice address in Madison, and 1,915 social worker records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 337 in Madison → All 1,915 in Wisconsin → Every provider in Madison →
Other social worker records in Wisconsin
- Taylor Aagaard, LCSWJanesville, WI1487300471
- Audrey Aardappel, LCSWSheboygan, WI1518024058
- Austann Abbott, CSWTomah, WI1548989411
- Dreams AbbottRacine, WI1023934627
- Joseph Abraham, LCSW ACSW CADCWest Allis, WI1265544019
- Ashley AcevedoFond Du Lac, WI1255115333
- Thomas Ackerman, MSWEau Claire, WI1649342338
- Alan Acuna, MSW, APSWOshkosh, WI1679462857
- Emily Adams, CAPSWMadison, WI1760271993
- Stacey AdamsMount Pleasant, WI1760039085
Common questions
What is Nancy J. Leff, LCSW's NPI number?
Nancy J. Leff, LCSW's National Provider Identifier (NPI) is 1124073499, issued on May 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nancy J. Leff, LCSW located?
The NPPES record lists a practice address at 2709 Marshall CT, Madison, WI, 53705. Phone: (608) 231-3191. Providers update this record themselves, so call before visiting.
How can I verify Nancy J. Leff, LCSW's license?
NPPES lists Wisconsin license number 2401-123, as entered by the provider. Search the Wisconsin 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.