NPPES file of Aug 9, 2026

Irena A. Leseiko-Owerko, O.D.

Optometrist · Chicago, IL

Irena A. Leseiko-Owerko, O.D. is an optometrist with a practice address in Chicago, Illinois, and NPI 1265440374, issued on Aug 4, 2006. Check the license (Illinois 046007930, 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
1265440374
Name
Irena A. Leseiko-Owerko
Credential
O.D.
Primary taxonomy
Optometrist 152W00000X
License number
046007930 IL
Self-reported in NPPES; status is on the state search
Practice location
2308 W Chicago Avenue, Chicago, IL 60622
Phone
(773) 486-2147
Enumerated
Aug 4, 2006
Record last updated
Aug 29, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(773) 486-4486
Medicaid ID
046007930 IL
Medicare enrollment
Enrolled (PECOS I20050207000761); may accept Medicare assignment
Medical or professional school
Illinois College Of Optometry At Chicago, 1986
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 optometrist records → All 2,697 in Illinois → Look up another NPI →

Verify Irena A. Leseiko-Owerko 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 046007930    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
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93% fewer Medicare Part D claims than the average optometrist in 2024

20 Medicare Part D claims for 13 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D.

  1. Irena Leseiko-Owerko20
  2. Specialty average277

Most prescribed

  1. Azelastine Hcl18 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.

Irena A. Leseiko-Owerko among 2,697 optometrist records in Illinois

Irena A. Leseiko-Owerko, O.D. is one of 2,697 optometrist records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.

  • NPI issued2006 · 8% of these records are older, 63% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated1986 · median 2008 among the 1,513 with a school on file
  • Record last updated2008 · 68% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Optometrist providers in Illinois

There are 2,697 optometrist records in Illinois.

All 2,697 in Illinois → Every provider in Chicago → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Michael Binder, O.D.Chicago, IL 606221598738353
  2. Stephanie Corbin, ODChicago, IL 606221124545603
  3. Kelsey FrederickChicago, IL 606221073927562
  4. Julie Klein, O.D.Chicago, IL 606221134675945
  5. David KorsakChicago, IL 606221659940492
  6. Cassandra Koutnik, O.D.Chicago, IL 606221093190019
  7. Chad Millsap, O.D.Chicago, IL 606221477584605
  8. Travis Park, O.D.Chicago, IL 606221689830275

Common questions

What is Irena A. Leseiko-Owerko, O.D.'s NPI number?

Irena A. Leseiko-Owerko, O.D.'s National Provider Identifier (NPI) is 1265440374, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Irena A. Leseiko-Owerko, O.D. located?

The NPPES record lists a practice address at 2308 W Chicago Avenue, Chicago, IL, 60622. Phone: (773) 486-2147. Providers update this record themselves, so call before visiting.

How can I verify Irena A. Leseiko-Owerko, O.D.'s license?

NPPES lists Illinois license number 046007930, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Irena A. Leseiko-Owerko, O.D. prescribe under Medicare Part D?

In 2024, Irena A. Leseiko-Owerko, O.D. had 20 Medicare Part D claims for 13 beneficiaries; the average among optometrist prescribers was 277. 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.