NPPES file of Aug 9, 2026

Jason Pencek, DC, FNP

Family Nurse Practitioner · Clarendon Hills, IL

Jason Pencek, DC, FNP is a family nurse practitioner with a practice address in Clarendon Hills, Illinois, and NPI 1215463393, issued on May 10, 2017. Check the license (Illinois 209.015396, 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
1215463393
Name
Jason Pencek
Credential
DC, FNP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
209.015396 IL
038.013075 IL
Self-reported in NPPES; status is on the state search
Practice location
4 Walker Ave Ste A, Clarendon Hills, IL 60514
Phone
(630) 734-3454
Enumerated
May 10, 2017
Record last updated
May 10, 2017 (not updated in 9 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 7,639 in Illinois → Look up another NPI →

Verify Jason Pencek 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 209.015396    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

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94% fewer Medicare Part D claims than the average family nurse practitioner in 2024

75 Medicare Part D claims for 21 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.

  1. Jason Pencek75
  2. Specialty average1,305

Most prescribed

  1. Armour Thyroid19 claims
  2. Liothyronine Sodium16 claims
  3. Levothyroxine Sodium11 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.

Jason Pencek among 7,639 family nurse practitioner records in Illinois

Jason Pencek, DC, FNP is one of 7,639 family nurse practitioner records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 37% of them.

  • NPI issued2017 · 37% of these records are older, 56% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2017 · 39% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

1 family nurse practitioner record lists a practice address in Clarendon Hills

They are 1 of the 108 NPPES records with a practice address in Clarendon Hills, and 7,639 family nurse practitioner records in Illinois.

All 7,639 in Illinois → Every provider in Clarendon Hills → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Servet Abdelhafez, APRNBrookfield, IL 605131790505048
  2. Patricia Austermuehle, RNDowners Grove, IL 605151972696136
  3. Dana Beyers, CNPDowners Grove, IL 605151255664447
  4. Angela Bower, DNP, FNP-BCDowners Grove, IL 605151952514473
  5. Sharron Chivari, RN, MSN, APRNDowners Grove, IL 605151861628703
  6. Corrina Cole, FNPDowners Grove, IL 605151427082924
  7. Tracie Cook, NPCDowners Grove, IL 605151679633853
  8. Suzanne Euliano, APNDowners Grove, IL 605151679898639

Common questions

What is Jason Pencek, DC, FNP's NPI number?

Jason Pencek, DC, FNP's National Provider Identifier (NPI) is 1215463393, issued on May 10, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Jason Pencek, DC, FNP located?

The NPPES record lists a practice address at 4 Walker Ave Ste A, Clarendon Hills, IL, 60514. Phone: (630) 734-3454. Providers update this record themselves, so call before visiting.

How can I verify Jason Pencek, DC, FNP's license?

NPPES lists Illinois license number 209.015396, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Jason Pencek, DC, FNP prescribe under Medicare Part D?

In 2024, Jason Pencek, DC, FNP had 75 Medicare Part D claims for 21 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.

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.