JOANNA MARIA IZEWSKI MD
NPI 1336503283
Obstetrics & Gynecology in Oak Lawn, IL
About Joanna Maria Izewski Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOANNA MARIA IZEWSKI MD (NPI 1336503283) is an individual obstetrics & gynecology provider in Oak Lawn, Illinois, licensed in Illinois (036-165730) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Joanna Maria Izewski Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Joanna Izewski reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oak Lawn, IL 60453
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Advocate Health And Hospitals Corporation
- 4,870 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60453 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OAK LAWN, IL 60453
OAK LAWN, IL 60453
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Joanna Izewski's NPI number?
The NPI number for Joanna Izewski is 1336503283. It was assigned to this individual provider in the NPPES registry on April 7, 2016.
Where is Joanna Izewski located?
Joanna Izewski practices at 4400 W 95th St Ste 207, Oak Lawn, IL 60453. The listed phone number is (708) 684-4636.
What is Joanna Izewski's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Joanna Izewski enrolled in Medicare?
Yes. Joanna Izewski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Joanna Izewski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joanna Izewski reassigns Medicare benefits to Advocate Health & Hospitals Corporation (Oak Lawn, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Joanna Izewski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Joanna Izewski was last updated on October 16, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Joanna Maria Izewski, MD · NPI 1336503283
Obstetrics & Gynecology physician in Oak Lawn, Illinois. Individual provider, active in the CMS NPPES registry since April 7, 2016.
## Identity
- **NPI:** 1336503283 (Entity type: Individual)
- **Enumerated:** April 7, 2016
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 036-165730 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4400 W 95TH ST STE 207, Oak Lawn, IL 60453-2658
- **Phone:** (708) 684-4636
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Advocate Health & Hospitals Corporation (NPI 1912936014, Oak Lawn, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** October 16, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1336503283) · Data from the CMS NPPES public registry.