NPPES file of Aug 9, 2026

Rebecca Ann Lotsoff, LCSW

Clinical Social Worker · Chicago, IL

Rebecca Ann Lotsoff, LCSW is a clinical social worker with a practice address in Chicago, Illinois, and NPI 1689766909, issued on Sep 28, 2006. Check the license (Illinois 149010866, 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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1689766909
Name
Rebecca Ann Lotsoff
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
149010866 IL
Self-reported in NPPES; status is on the state search
Practice location
30 N Michigan Ave, Chicago, IL 60602
Phone
(312) 259-5769
Enumerated
Sep 28, 2006
Record last updated
Jun 13, 2025
Fax
(312) 587-8401
Medicare enrollment
Enrolled (PECOS I20040723001263); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical social worker records → All 13,637 in Illinois → Look up another NPI →

Also registered at 30 N Michigan Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. William Aber, PH.D.Clinical Psychologist1598777187
  2. Andrea Alpert, L.C.S.W.Clinical Social Worker1962526657
  3. Bailey AmisProfessional Counselor1720662448
  4. Elizabeth Aram, PSYDClinical Psychologist1396257366
  5. Maria Ashley, DDSDentist1508083288
  6. David Baum, MDObstetrics & Gynecology Physician1245296888

Verify Rebecca Ann Lotsoff in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 149010866    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Rebecca Ann Lotsoff among 13,637 clinical social worker records in Illinois

Rebecca Ann Lotsoff, 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 2006, is newer than under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 90% newer
  • In a Medicare fileNo · 14% of these records are
  • In the CMS Doctors and Clinicians fileYes · 21% of these records are
  • Graduated2002 · median 2010 among the 2,895 with a school on file
  • Record last updated2025 · 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

  1. Roseann Adams, MSW. LCSWChicago, IL 606021134103872
  2. Sandra Addison, L.C.S.W.Chicago, IL 606021114935202
  3. Anna Avery, LCSWChicago, IL 606021386615268
  4. Kenneth Breitwiser, LCSWChicago, IL 606021700869104
  5. Jay Callahan, PHD, LCSWChicago, IL 606021093779498
  6. Ann Gerut, L.C.S.W.Chicago, IL 606021679686125
  7. Michelle Hofmeister, LCSWChicago, IL 606021124001508
  8. Natalie Holzman, M.S.W.Chicago, IL 606021154354793

Common questions

What is Rebecca Ann Lotsoff, LCSW's NPI number?

Rebecca Ann Lotsoff, LCSW's National Provider Identifier (NPI) is 1689766909, issued on Sep 28, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Rebecca Ann Lotsoff, LCSW located?

The NPPES record lists a practice address at 30 N Michigan Ave, Chicago, IL, 60602. Phone: (312) 259-5769. Providers update this record themselves, so call before visiting.

How can I verify Rebecca Ann Lotsoff, LCSW's license?

NPPES lists Illinois license number 149010866, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.