An independent reading of one public CMS file

Enrollment Watch does one thing: it reads the revalidation list CMS publishes every month and turns it into an answer a billing office can act on — this NPI’s due date, what changed since last month, and which of the NPIs you bill are already past their date.

Where every number comes from

The source is the public CMS revalidation list, the same file anybody can download from data.cms.gov. It is not a scrape of PECOS and it is not a purchased list. Each month we import the file whole, keep it, and compare it with the month before. Every date on this site opens the row it came from, with the month of the file and the day that file was published, so a figure can be checked against CMS without asking us.

The file is large — roughly three million enrollment rows across about 228,000 organizations — so two different counts appear on this site and both are labelled: enrollments on the NPI and state report pages, and organizations on the past-due lists. They differ by about ten to one. A page that mixed them would be wrong by a factor of ten and still look plausible.

What “past due” means here

A due date that has already passed, inside the last year. That window exists because a date from 2022 is almost always a filing the file never caught up with, or an organization that stopped billing — neither is something a call fixes. The past-due lists narrow it further to the 90-day clock in 42 CFR 424.540(a)(3), the point after which CMS may deactivate billing privileges.

A row with no published date reads TBD and is never counted as overdue. A calculated figure is marked as an estimate next to the figure, not in a footnote.

What this tool will not do

• Ask for a PECOS or Medicare password. There is nowhere on this site to type one.
• Sign an 855 or a CMS-588 on your behalf. You sign; we prepare.
• Submit anything to CMS without you.
• Store PHI, claims, or beneficiary data. The CMS file has none.
• Promise a CMS outcome. A date on a public file is not a decision.

If something here is wrong

The CMS dataset wins, always. If a date on this site differs from the row CMS published, the row is the record and the page is a bad copy of it. Every NPI page links to the row itself so the comparison takes one click; tell us and the import gets checked.

Who runs it

Enrollment Watch is an independent tool, built and operated by a small team that works on Medicare enrollment paperwork. It is not affiliated with CMS, HHS, or any MAC, and no one at CMS reviewed it. Independent tool. Not affiliated with CMS or the U.S. Department of Health and Human Services.

Questions, corrections, or a data request: ava@mail.enrollmentwatch.com.

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