NPPES file of Aug 9, 2026

Jacqueline Sielaff

Nurse Practitioner · Crestwood, IL

Jacqueline Sielaff is a nurse practitioner with a practice address in Crestwood, Illinois, and NPI 1083455430, issued on May 31, 2024. Check the license (Illinois 209029794, 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
1083455430
Name
Jacqueline Sielaff
Primary taxonomy
Nurse Practitioner 363L00000X
License number
209029794 IL
Self-reported in NPPES; status is on the state search
Practice location
4736 Cal Sag RD Ste A, Crestwood, IL 60418
Phone
(708) 390-7001
Enumerated
May 31, 2024
Record last updated
Jan 28, 2026
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 nurse practitioner records → All 4,892 in Illinois → Look up another NPI →

Also registered at 4736 Cal Sag RD Ste A

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

  1. Thomas Joseph, MDFamily Medicine Physician1770599797

Verify Jacqueline Sielaff 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 209029794    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 nurse practitioner in 2024

68 Medicare Part D claims for 46 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.

  1. Jacqueline Sielaff68
  2. Specialty average1,109

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.

Jacqueline Sielaff among 4,892 nurse practitioner records in Illinois

Jacqueline Sielaff 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 2024, is newer than 87% of them.

  • NPI issued2024 · 87% of these records are older, 8% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 69% of these records are
  • Record last updated2026 · 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).

3 nurse practitioner records list a practice address in Crestwood

They are 3 of the 164 NPPES records with a practice address in Crestwood, and 4,892 nurse practitioner records in Illinois.

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

The 8 nurse practitioner records with the nearest ZIP codes

  1. Christina Wagener, APNCrestwood, IL 604181033469994
  2. Sylvia Pawlik, RN, CNPDolton, IL 604191326006537
  3. Sandra Abraham, CNPDwight, IL 604201982883245
  4. Angela Kostner, APN-CNPDiamond, IL 604161023406980
  5. Kristen BugajskiChicago Ridge, IL 604151497568133
  6. Desirae Demarco, APNChicago Ridge, IL 604151821628710
  7. Amy Erickson, APRNChicago Ridge, IL 604151750255253
  8. James Gordon, NPChicago Ridge, IL 604151972335024

Common questions

What is Jacqueline Sielaff's NPI number?

Jacqueline Sielaff's National Provider Identifier (NPI) is 1083455430, issued on May 31, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Jacqueline Sielaff located?

The NPPES record lists a practice address at 4736 Cal Sag RD Ste A, Crestwood, IL, 60418. Phone: (708) 390-7001. Providers update this record themselves, so call before visiting.

How can I verify Jacqueline Sielaff's license?

NPPES lists Illinois license number 209029794, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Jacqueline Sielaff prescribe under Medicare Part D?

In 2024, Jacqueline Sielaff had 68 Medicare Part D claims for 46 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.