CMS Proposes Cutting Lab Pay Up to 23% — and Congress Is Pushing Back
Medicare wants to pay laboratories a lot less next year — and this time, Congress might stop it.
The proposed cuts
CMS has published preliminary 2027 rates for the Clinical Laboratory Fee Schedule (CLFS), and the numbers are steep. Nearly 1,200 tests would see cuts, with gene sequencing down 23%, molecular pathology down 22%, microbiology and immunology down 19.3% each, and routine chemistry down 16%. CMS estimates the cuts would save about $1 billion a year — out of just $8.4 billion in total Medicare lab spending. Final rates are expected in November 2026, with cuts phasing in over several years. (HealthExec summary)
Laboratory groups say the underlying data is flawed. ASCP notes that no private-payer data was reported for roughly 20% of laboratory services, raising questions about how CMS priced those tests at all.
The response: the RESULTS Act
A bipartisan bill — the Reforming and Enhancing Sustainable Updates to Laboratory Testing Services (RESULTS) Act — would freeze CLFS rates at 2026 levels for 2027 and 2028, blocking the proposed cuts outright. It would also replace the current data-collection process with an independent commercial claims database, so future rates reflect actual market prices, and reduce the reporting burden on laboratories. The bill is backed by a broad industry coalition, and ASCP is urging lab professionals to contact Congress in support. (StopLabCuts.org)
This isn't the first round. CMS already cut lab rates up to 10% per year in 2018–2020, and a separate round of cuts slated for 2026 was blocked by earlier legislation. The 2027 proposal is the next battle.
What labs should do now
- Make your voice heard. ASCP's eAdvocacy Center has a pre-written letter asking members of Congress to support the RESULTS Act. It takes a few minutes.
- Tighten billing accuracy today. Whatever Congress does, reimbursement pressure is only moving one direction. Every denied claim hurts more when rates shrink. That means medical-necessity documentation that matches the diagnosis, LCD/NCD checks before submission, and clean claims the first time — the same discipline surveyors look for.
- Watch November. CMS finalizes the 2027 rates next month. If the cuts survive, laboratories will need to model the revenue impact test by test.
The bottom line
Payment policy and compliance are converging: thinner reimbursement makes every billing error more expensive, and every documentation gap a bigger audit risk. Laboratories that treat billing accuracy as a compliance function — not just a finance function — will weather this best.
Zilgene helps laboratories build inspection-ready operations, from CLIA compliance to revenue-cycle discipline. Contact us for a free first consultation.
Sources: CMS preliminary 2027 CLFS rates via HealthExec; RESULTS Act details via StopLabCuts.org and ASCP's October 2026 action alert. Proposed figures are preliminary — verify against the final CMS release before relying on specific percentages.
