DR. ALYSSA CHRISTINE BUJNAK MD
NPI 1265921688
Obstetrics & Gynecology - Gynecologic Oncology in Arlington Heights, IL
About Dr. Alyssa Christine Bujnak Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALYSSA CHRISTINE BUJNAK MD (NPI 1265921688) is an individual gynecologic oncology provider in Arlington Heights, Illinois, licensed in Illinois (036177190) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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. Alyssa Christine Bujnak 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 Reassignments
3Medicare enrollment records show Alyssa Bujnak reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 clinicians in this Medicare group
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 1,905 clinicians in this Medicare group
Chicago, IL 60637
- Reassigned Medicare billing, Illinois and Indiana enrollments
- 2,237 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
The University Of Chicago Medical Center
Acute Care Hospitals · Chicago, ILCommunity Hospital
Acute Care Hospitals · Munster, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60005 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.
ARLINGTON HEIGHTS, IL 60005
ARLINGTON HEIGHTS, IL 60005
ARLINGTON HEIGHTS, IL 60005
ARLINGTON HEIGHTS, IL 60005
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 Alyssa Bujnak's NPI number?
The NPI number for Alyssa Bujnak is 1265921688. It was assigned to this individual provider in the NPPES registry on May 2, 2018.
Where is Alyssa Bujnak located?
Alyssa Bujnak practices at 800 W Central Rd, Arlington Heights, IL 60005. The listed phone number is (847) 618-3800.
What is Alyssa Bujnak's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.
Is Alyssa Bujnak enrolled in Medicare?
Yes. Alyssa Bujnak 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 Alyssa Bujnak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alyssa Bujnak reassigns Medicare benefits to 3 organizations: Endeavor Health Medical Group (Evanston, IL), The University Of Chicago Medical Center (Chicago, IL) and University Of Chicago (Chicago, IL). 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 Alyssa Bujnak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alyssa Bujnak affiliated with any hospitals?
According to CMS data, Alyssa Bujnak is affiliated with The University Of Chicago Medical Center and Community Hospital.
When was this NPI record last updated?
The NPPES record for Alyssa Bujnak was last updated on December 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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. Alyssa Christine Bujnak, MD · NPI 1265921688
Gynecologic Oncology physician in Arlington Heights, Illinois. Individual provider, active in the CMS NPPES registry since May 2, 2018.
## Identity
- **NPI:** 1265921688 (Entity type: Individual)
- **Enumerated:** May 2, 2018
- **Primary specialty:** Obstetrics & Gynecology - Gynecologic Oncology · taxonomy 207VX0201X
- **State license:** 036177190 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 W CENTRAL RD, Arlington Heights, IL 60005-2349
- **Phone:** (847) 618-3800
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Endeavor Health Medical Group (NPI 1497701882, Evanston, IL); The University Of Chicago Medical Center (NPI 1033218128, Chicago, IL); University Of Chicago (NPI 1821048786, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Columbia School Of Medicine, class of 2018
## Record status
- **NPPES last updated:** December 8, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1265921688) · Data from the CMS NPPES public registry.