DR. MAIRE H OKONIEWSKI DO
NPI 1437655016
Internal Medicine - Hematology & Oncology in Westwood, KS
About Dr. Maire H Okoniewski Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MAIRE H OKONIEWSKI DO (NPI 1437655016) is an individual hematology & oncology provider in Westwood, Kansas, licensed in Kansas (05-53066) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS, is affiliated with University Of Kansas Hospital, and is a graduate of Kansas City University Of Med & Biosciences, College Of Osteo Med (2018).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Dr. Maire H Okoniewski Do 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 Reassignments
2Medicare enrollment records show Maire Okoniewski reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Kansas City, KS 66160
- Reassigned Medicare billing, Kansas enrollment
- 323 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Kansas Hospital
Acute Care Hospitals · Kansas City, KSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 66205 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WESTWOOD, KS 66205
WESTWOOD, KS 66205
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 Maire Okoniewski's NPI number?
The NPI number for Maire Okoniewski is 1437655016. It was assigned to this individual provider in the NPPES registry on April 3, 2018.
Where is Maire Okoniewski located?
Maire Okoniewski practices at 2650 Shawnee Mission Pkwy, Westwood, KS 66205. The listed phone number is (913) 588-1227.
What is Maire Okoniewski's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Maire Okoniewski enrolled in Medicare?
Yes. Maire Okoniewski 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 organizations bill Medicare for Maire Okoniewski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maire Okoniewski reassigns Medicare benefits to 2 organizations: University Of Kansas Hospital Authority (Kansas City, KS) and Brigham & Womens Physicians Organization Inc (Boston, MA). Each 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 Maire Okoniewski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Maire Okoniewski accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Ambetter of Oklahoma and Blue Cross and Blue Shield of Kansas City and 3 other insurers list Maire Okoniewski as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Maire Okoniewski affiliated with any hospitals?
According to CMS data, Maire Okoniewski is affiliated with University Of Kansas Hospital.
When was this NPI record last updated?
The NPPES record for Maire Okoniewski was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.
# Dr. Maire H Okoniewski, DO · NPI 1437655016
Hematology & Oncology physician in Westwood, Kansas. Individual provider, active in the CMS NPPES registry since April 3, 2018.
## Identity
- **NPI:** 1437655016 (Entity type: Individual)
- **Enumerated:** April 3, 2018
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 05-53066 (Kansas)
- **Sole proprietor:** No
## Practice location
- **Address:** 2650 SHAWNEE MISSION PKWY, Westwood, KS 66205-2003
- **Phone:** (913) 588-1227
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): University Of Kansas Hospital Authority (NPI 1528019502, Kansas City, KS); Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Kansas City University Of Med & Biosciences, College Of Osteo Med, class of 2018
## Record status
- **NPPES last updated:** June 26, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437655016) · Data from the CMS NPPES public registry.