CMS Transmittals (sub-regulatory guidance) · September 29, 2026 · Primary source
R13979CP
Summary
CMS issued Transmittal R13979CP on September 29, 2026, updating the October 2026 Integrated Outpatient Code Editor specifications to Version 27.3 under Change Request 14594, with an implementation date of October 5, 2026. The transmittal applies to Publication 100-04 and governs outpatient claim editing logic used by Medicare Administrative Contractors.
What this may mean
Hospital outpatient departments and ASCs that submit claims through the I/OCE system must apply the updated Version 27.3 editing specifications by October 5, 2026. Failure to align claim submission with the revised editor specifications may result in claim rejections or payment delays on Medicare outpatient claims.
Informational only. Not legal, medical, financial, or other professional advice. Always consult a qualified professional familiar with your specific facts before relying on any item.
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