DENIS A. WILLIAMS MD
NPI 1750552881
Orthopaedic Surgery - Sports Medicine in Champaign, IL
About Denis A. Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DENIS A. WILLIAMS MD (NPI 1750552881) is an individual sports medicine provider in Champaign, Illinois, licensed in Illinois (036117930) and active in the NPI registry since March 2008. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
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
Denis A. 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 Denis 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 60625
- Reassigned Medicare billing, Illinois enrollment
- 350 clinicians in this Medicare group
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 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 6
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northshore University Healthsystem - Evanston Hospital
Acute Care Hospitals · Evanston, ILPresence Saint Francis Hospital
Acute Care Hospitals · Evanston, ILSwedish Hospital
Acute Care Hospitals · Chicago, ILMedicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Other Providers at the Same Location NPPES 11
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 Denis Williams's NPI number?
The NPI number for Denis Williams is 1750552881. It was assigned to this individual provider in the NPPES registry on March 17, 2008.
Where is Denis Williams located?
Denis Williams practices at 2110 Fox Dr, Champaign, IL 61820. The listed phone number is (217) 366-1323.
What is Denis Williams's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Sports Medicine, with taxonomy code 207XX0005X.
Is Denis Williams enrolled in Medicare?
Yes. Denis 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 Denis Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Denis Williams reassigns Medicare benefits to 2 organizations: Swedish Covenant Management Services, Inc. (Chicago, IL) and Endeavor Health Medical Group (Evanston, 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 Denis Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Denis Williams accept?
Health plans from Oscar Health list Denis Williams 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 Denis Williams affiliated with any hospitals?
According to CMS data, Denis Williams is affiliated with Northshore University Healthsystem - Evanston Hospital, Presence Saint Francis Hospital and Swedish Hospital.
When was this NPI record last updated?
The NPPES record for Denis Williams was last updated on April 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.