NPPES file of Aug 9, 2026

David Dennis, LCSW

Clinical Social Worker · Naperville, IL

David Dennis, LCSW is a clinical social worker with a practice address in Naperville, Illinois, and NPI 1255196911, issued on Feb 20, 2024. Check the license (Illinois 149.026614, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1255196911
Name
David Dennis
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
149.026614 IL
Self-reported in NPPES; status is on the state search
Practice location
200 E 5TH Ave Ste 109, Naperville, IL 60563
Phone
(708) 945-8557
Enumerated
Feb 20, 2024
Record last updated
Feb 20, 2024
Medicare enrollment
Enrolled (PECOS I20240531003388); 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 200 E 5TH Ave Ste 109

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

  1. McKenzie Altmayer, MSMental Health Counselor1730907254
  2. Andre Amaro, LPCProfessional Counselor1508644576
  3. Sarah Anteliz, MSWClinical Social Worker1457243024
  4. Julie BabyarSocial Worker1215744529
  5. Bailey Behrman, LSWSocial Worker1235734567
  6. Dana BonnecarreSocial Worker1871311308

Verify David Dennis 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 149.026614    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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Bills Medicare through one group practice

  1. Alw Group GrowNaperville, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

David Dennis among 13,637 clinical social worker records in Illinois

David Dennis, 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. Its NPI, issued in 2024, is newer than 87% of them.

  • NPI issued2024 · 87% of these records are older, 8% newer
  • In a Medicare fileYes · 14% of these records are
  • In the CMS Doctors and Clinicians fileYes · 21% of these records are
  • Graduated2020 · median 2010 among the 2,895 with a school on file
  • Record last updated2024 · 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).

307 clinical social worker records list a practice address in Naperville

They are 307 of the 4,634 NPPES records with a practice address in Naperville, and 13,637 clinical social worker records in Illinois.

All 13,637 in Illinois → Every provider in Naperville → Clinical Social Worker nationwide →

The 8 clinical social worker records with the nearest ZIP codes

  1. Karen Bailey, LCSWNaperville, IL 605631861579120
  2. Christina Cal Shane, LCSWNaperville, IL 605631699888503
  3. Glen Cannon, LCPCNaperville, IL 605631588749550
  4. Laura Discipio, LCSWNaperville, IL 605631942289756
  5. Lisa Gray, LCSWNaperville, IL 605631831107002
  6. John Konny, LCSWNaperville, IL 605631992881742
  7. Lori Lee, LCSWNaperville, IL 605631144314691
  8. Christian Locke, LCSWNaperville, IL 605631407949720

Common questions

What is David Dennis, LCSW's NPI number?

David Dennis, LCSW's National Provider Identifier (NPI) is 1255196911, issued on Feb 20, 2024. An NPI identifies a provider in billing; it is not a license.

Where is David Dennis, LCSW located?

The NPPES record lists a practice address at 200 E 5TH Ave Ste 109, Naperville, IL, 60563. Phone: (708) 945-8557. Providers update this record themselves, so call before visiting.

How can I verify David Dennis, LCSW's license?

NPPES lists Illinois license number 149.026614, 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. Medicare files from data.cms.gov. 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.