State report · IL
Medicare revalidations past due in Illinois
The CMS revalidation file for October 2026 lists 8,395 organizations in Illinois. 1,357 of them show a due date inside the last year that has already passed, and 258 of those are inside the 90-day clock. These are the 20 whose date went by most recently — the ones a filing still rescues, and the ones somebody can act on today. A chain with hundreds of NPIs appears once, with the count beside it.
Source: CMS Revalidation Due Date ListPublisher: Centers for Medicare & Medicaid ServicesFile dated 2026-10-01Open the dataset
Is your NPI one of them?
The list below is the twenty organizations whose date went by most recently. If you already have one number, type it here and read the answer off the same file this page was built from — no account, no email.
Free. No account. From the CMS revalidation list for October 2026.
How to read this list
- Past the date is not deactivated. CMS publishes a due date. It does not publish whether the 855 was filed, and a date often stays on the file after the paperwork went in.
- One row per organization, not per enrollment. A group with three enrollments appears once, with the most recent date it holds inside the window. Individual enrollments are left off on purpose: that address is often a person’s home.
- The list starts with the dates that just went by. 42 CFR 424.540(a)(3) gives 90 days from the due date before CMS may deactivate billing privileges, so a date inside that window still has a filing that lands in time. That is why the newest dates come first and why the list stops at 90 days: a date older than that is usually a filing the file never caught up with, or an organization that stopped billing, and neither is something a phone call fixes.
- CMS issues due dates in batches. Several organizations share one date, so the top of this list is one date with the largest groups first. That is the file, not a sampling error.
- Every name is checkable. Each row opens that NPI’s own page, and that page links to the exact row CMS published.
Not an official CMS system. Verify before filing.
All IL rows for October 2026 →September 2026 →Where these dates come from