STACEY GUSAK
NPI 1649859521
Nurse Practitioner - Family in Oak Park, IL
About Stacey Gusak NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STACEY GUSAK (NPI 1649859521) is an individual family provider in Oak Park, Illinois, licensed in Illinois (209024281) and active in the NPI registry since April 2021. She is enrolled in Medicare PECOS, is affiliated with West Suburban Medical Center, and maintains a secondary practice location in Chicago.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Stacey Gusak 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
6Medicare enrollment records show Stacey Gusak reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60616
- Reassigned Medicare billing, Illinois enrollment
- 354 clinicians in this Medicare group
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 635 clinicians in this Medicare group
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 2,237 clinicians in this Medicare group
Bolingbrook, IL 60440
- Reassigned Medicare billing, Illinois enrollment
- 187 clinicians in this Medicare group
East Chicago, IN 46312
- Reassigned Medicare billing, Indiana enrollment
- 598 clinicians in this Medicare group
Aurora, IL 60504
- Reassigned Medicare billing, Illinois enrollment
- 116 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
West Suburban Medical Center
Acute Care Hospitals · Oak Park, ILThe University Of Chicago Medical Center
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60302 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.
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 Stacey Gusak's NPI number?
The NPI number for Stacey Gusak is 1649859521. It was assigned to this individual provider in the NPPES registry on April 6, 2021.
Where is Stacey Gusak located?
Stacey Gusak practices at 3 Erie Ct, Oak Park, IL 60302. The listed phone number is (708) 383-6200.
What is Stacey Gusak's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Stacey Gusak enrolled in Medicare?
Yes. Stacey Gusak 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 Stacey Gusak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stacey Gusak reassigns Medicare benefits to 6 organizations: Insight Chicago, Inc. (Chicago, IL), The University Of Chicago Medical Center (Chicago, IL), University Of Chicago (Chicago, IL), Illinois Emergency Medicine Specialists, LLC (Bolingbrook, IL), Cep America LLC (East Chicago, IN) and 1 more organization, listed in the Medicare section above. 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 Stacey Gusak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stacey Gusak accept?
Health plans from CareSource list Stacey Gusak 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 Stacey Gusak affiliated with any hospitals?
According to CMS data, Stacey Gusak is affiliated with West Suburban Medical Center and The University Of Chicago Medical Center.
When was this NPI record last updated?
The NPPES record for Stacey Gusak was last updated on July 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Stacey Gusak · NPI 1649859521
Family physician in Oak Park, Illinois. Individual provider, active in the CMS NPPES registry since April 6, 2021.
## Identity
- **NPI:** 1649859521 (Entity type: Individual)
- **Enumerated:** April 6, 2021
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 209024281 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 3 ERIE CT, Oak Park, IL 60302-2519
- **Phone:** (708) 383-6200
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Insight Chicago, Inc. (NPI 1881261006, Chicago, IL); The University Of Chicago Medical Center (NPI 1033218128, Chicago, IL); University Of Chicago (NPI 1821048786, Chicago, IL); Illinois Emergency Medicine Specialists, LLC (NPI 1003150962, Bolingbrook, IL); Cep America LLC (NPI 1336805563, East Chicago, IN); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rush Medical College Of Rush University, class of 2021
## Record status
- **NPPES last updated:** July 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1649859521) · Data from the CMS NPPES public registry.