Quick answers
- Does Irena A. Leseiko Owerko accept Medicare assignment?
- Medicare's clinician data says Irena A. Leseiko Owerko may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Irena A. Leseiko Owerko see?
- In 2024, CMS data shows 32 Original Medicare patients and 34 services for Irena A. Leseiko Owerko. This counts Original Medicare only and measures volume, not quality.
- What is Irena A. Leseiko Owerko's NPI number?
- 1265440374. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Irena A. Leseiko Owerko, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 32 |
|---|---|
| Services billed to Medicare | 34 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)19 services
- New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more (99202)11 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure72%
- Arthritis66%
- Diabetes44%
- Anxiety38%
- Depression34%
Practice locations
Addresses where Irena A. Leseiko Owerko is enrolled with Medicare (CMS data updated October 2, 2026).
- 2308 W Chicago Ave, Unit 1Chicago, IL 60622 (773) 486‑2147
Specialties
- Optometryprimary
Other optometrists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Illinois College Of Optometry At Chicago |
| Graduation year | 1986 (40 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1265440374 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians