NPPES file of Aug 9, 2026

Kathryn Heyduck, APN

Primary Care Nurse Practitioner · Downers Grove, IL

Kathryn Heyduck, APN is a primary care nurse practitioner with a practice address in Downers Grove, Illinois, and NPI 1700335668, issued on Oct 3, 2016. Check the license (Illinois 209014852, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1700335668
Name
Kathryn Heyduck
Credential
APN
Primary taxonomy
Primary Care Nurse Practitioner 363LP2300X
License number
209014852 IL
Self-reported in NPPES; status is on the state search
Practice location
1441 Branding Ave, Downers Grove, IL 60515
Phone
(630) 963-3200
Enumerated
Oct 3, 2016
Record last updated
Oct 27, 2016 (not updated in 10 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20170515000700); 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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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. Lyudmyla Ilyash, FNP-CFamily Nurse Practitioner1669836896
  5. Carolyn Mendez, ANP-BCAdult Health Nurse Practitioner1154631422
  6. Chidinma Oji, FNPFamily Nurse Practitioner1013348069

Verify Kathryn Heyduck 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 209014852
    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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93% fewer Medicare Part D claims than the average primary care nurse practitioner in 2024

104 Medicare Part D claims for 33 beneficiaries, against an average of 1,492 among the 5,992 providers of this specialty who prescribed in Part D. 51 claims were for opioids.

  1. Kathryn Heyduck104
  2. Specialty average1,492

Most prescribed

  1. Hydrocodone-Acetaminophen12 claims
  2. Hydromorphone Hcl12 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Unity Hospice OF Chicagoland LLCChicago, IL

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

Kathryn Heyduck among 250 primary care nurse practitioner records in Illinois

Kathryn Heyduck, APN is one of 250 primary care nurse practitioner records with a practice address in Illinois. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 22% of them.

  • NPI issued2016 · 22% of these records are older, 69% newer
  • In a Medicare fileYes · 69% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated2016 · median 2019 among the 141 with a school on file
  • Record last updated2016 · 38% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP2300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Primary Care Nurse Practitioner providers in Illinois

There are 250 primary care nurse practitioner records in Illinois.

The 8 primary care nurse practitioner records with the nearest ZIP codes

  1. Christina Graham, APRNDowners Grove, IL 605151154730323
  2. Nadia Lambermont, ARNPHinsdale, IL 605211821264342
  3. Vini Oliyapurathu, MDHinsdale, IL 605211598275174
  4. Francisco Banez, ARNPOak Brook, IL 605231275972655
  5. Beverly Knigge, A.P.N., C.N.P.Oak Brook, IL 605231871585224
  6. Haya Ismail, NPAurora, IL 605061760339253
  7. Jamilah JohnsonWillowbrook, IL 605271154796605
  8. Compton Paul, APRNAurora, IL 605031063179141

Common questions

What is Kathryn Heyduck, APN's NPI number?

Kathryn Heyduck, APN's National Provider Identifier (NPI) is 1700335668, issued on Oct 3, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Kathryn Heyduck, APN located?

The NPPES record lists a practice address at 1441 Branding Ave, Downers Grove, IL, 60515. Phone: (630) 963-3200. Providers update this record themselves, so call before visiting.

How can I verify Kathryn Heyduck, APN's license?

NPPES lists Illinois license number 209014852, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Kathryn Heyduck, APN prescribe under Medicare Part D?

In 2024, Kathryn Heyduck, APN had 104 Medicare Part D claims for 33 beneficiaries; the average among primary care nurse practitioner prescribers was 1,492. Part D covers Medicare prescriptions 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.

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.