NPPES file of Aug 9, 2026

Peggy Siegele, APN

Nurse Practitioner · Downers Grove, IL

Peggy Siegele, APN is a nurse practitioner with a practice address in Downers Grove, Illinois, and NPI 1720456007, issued on Sep 3, 2015. Check the license (Illinois 209013120, 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
1720456007
Name
Peggy Siegele
Credential
APN
Primary taxonomy
Nurse Practitioner 363L00000X
License number
209013120 IL
Self-reported in NPPES; status is on the state search
Practice location
1441 Branding Ave, Downers Grove, IL 60515
Phone
(630) 572-9393
Enumerated
Sep 3, 2015
Record last updated
Jan 9, 2025
Medicare enrollment
Enrolled (PECOS I20160201000003); 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 nurse practitioner records → All 4,892 in Illinois → Look up another NPI →

Also registered at 1441 Branding Ave

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

  1. Susan Dames, LCSWClinical Social Worker1477964138
  2. Mary Gewargis, ANP-BCAdult Health Nurse Practitioner1437441318
  3. Betty Hawkins-Smith, FNPFamily Nurse Practitioner1295838357
  4. Kathryn Heyduck, APNPrimary Care Nurse Practitioner1700335668
  5. Lyudmyla Ilyash, FNP-CFamily Nurse Practitioner1669836896
  6. Carolyn Mendez, ANP-BCAdult Health Nurse Practitioner1154631422

Verify Peggy Siegele 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 209013120    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. Advocate Health And Hospitals CorporationDowners Grove, IL

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

Peggy Siegele among 4,892 nurse practitioner records in Illinois

Peggy Siegele, APN is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 31% of them.

  • NPI issued2015 · 31% of these records are older, 64% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2009 · median 2018 among the 3,389 with a school on file
  • Record last updated2025 · 36% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

52 nurse practitioner records list a practice address in Downers Grove

They are 52 of the 1,899 NPPES records with a practice address in Downers Grove, and 4,892 nurse practitioner records in Illinois.

All 4,892 in Illinois → Every provider in Downers Grove → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Crystal Cowan, FNP-BCDowners Grove, IL 605151609011261
  2. Maddalena Deneufbourg, CNPDowners Grove, IL 605151952461972
  3. Katrina Escarilla, R.N., A.P.N.,C.N.P.Downers Grove, IL 605151689881518
  4. Marikay Fitzpatrick, FAMILY MEDICINE NPDowners Grove, IL 605151336193002
  5. Victoria Kelly, APRNDowners Grove, IL 605151255324513
  6. Karen Knox, APNDowners Grove, IL 605151083796270
  7. Patricia May, NPDowners Grove, IL 605151821016213
  8. Kathy O'Grady, NPDowners Grove, IL 605151942235908

Common questions

What is Peggy Siegele, APN's NPI number?

Peggy Siegele, APN's National Provider Identifier (NPI) is 1720456007, issued on Sep 3, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Peggy Siegele, APN located?

The NPPES record lists a practice address at 1441 Branding Ave, Downers Grove, IL, 60515. Phone: (630) 572-9393. Providers update this record themselves, so call before visiting.

How can I verify Peggy Siegele, APN's license?

NPPES lists Illinois license number 209013120, 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.