DR. TREY DEJUAN WILLIAMS MD
NPI 1487302014
Emergency Medicine in Chicago, IL
About Dr. Trey Dejuan Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TREY DEJUAN WILLIAMS MD (NPI 1487302014) is an individual emergency medicine provider in Chicago, Illinois, licensed in Illinois (036178677) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and is a graduate of Michigan State University College Of Human Medicine (2023).
NPPES Registry Identity
Specialties & Licenses
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. Trey Dejuan Williams 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
2Medicare enrollment records show Trey Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 1,905 clinicians in this Medicare group
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 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
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, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60637 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.
CHICAGO, IL 60637
CHICAGO, IL 60637
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 Trey Williams's NPI number?
The NPI number for Trey Williams is 1487302014. It was assigned to this individual provider in the NPPES registry on March 14, 2022.
Where is Trey Williams located?
Trey Williams practices at 5841 S Maryland Ave # Mc5068, Chicago, IL 60637. The listed phone number is (773) 702-6250.
What is Trey Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Trey Williams enrolled in Medicare?
Yes. Trey Williams 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 Trey Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Trey Williams reassigns Medicare benefits to 2 organizations: 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 Trey Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Trey Williams affiliated with any hospitals?
According to CMS data, Trey Williams is affiliated with The University Of Chicago Medical Center.
When was this NPI record last updated?
The NPPES record for Trey Williams was last updated on July 21, 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.
# Dr. Trey Dejuan Williams, MD · NPI 1487302014
Emergency Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since March 14, 2022.
## Identity
- **NPI:** 1487302014 (Entity type: Individual)
- **Enumerated:** March 14, 2022
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 036178677 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 5841 S MARYLAND AVE # MC5068, Chicago, IL 60637-1443
- **Phone:** (773) 702-6250
## 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): 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:** Michigan State University College Of Human Medicine, class of 2023
## Record status
- **NPPES last updated:** July 21, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1487302014) · Data from the CMS NPPES public registry.