Hospital price transparency compliance,
done right.

We turn your remittance data into a machine-readable file that passes CMS's official validator — and manage the CEO attestation. Purpose-built for critical-access and rural hospitals.

Get a free compliance check How it works

The 2026 rule is here — and enforcement is live

Since April 1, 2026, CMS requires hospitals to publish median, 10th- and 90th-percentile allowed amounts computed from their 835 remittance data, in a strict machine-readable format, with a named CEO attestation. Hundreds of hospitals are already under warning notices and corrective-action plans, with penalties that reach roughly $118,000 a year for a small hospital.

Apr 2026
Enforcement began
~$118K/yr
Penalty exposure, small hospital
v3.0
Required CMS file format

What AttestWell does

From your remittance data to a filed, defensible, validator-passing file — and we keep it current.

1

Ingest your 835 data

Securely, under a BAA. We use your remittance data over the required 12–15 month lookback.

2

Compute the required figures

Median, 10th- and 90th-percentile allowed amounts and counts — exactly as the CY2026 rule specifies.

3

Generate & attest

A CMS v3.0 file validated against CMS's own validator, plus a clean named-attester workflow for your CEO.

Priced for rural hospitals

Our critical-access tier is built to fit within the SHIP grant envelope — which explicitly allows price-transparency software. For many hospitals, the file the federal government requires is one the federal grant helps pay for.

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