CMS Transmittals (sub-regulatory guidance) · September 28, 2026 · Primary source
R13977OTN
Summary
CMS issued Transmittal R13977OTN on September 28, 2026, with an implementation date of October 5, 2026, covering HIPAA Electronic Data Interchange front-end system updates under Publication 100-20. The transmittal is a technical systems notice related to EDI transaction processing on the Medicare fee-for-service front end. No substantive policy change or new compliance obligation is described in the transmittal record.
What this may mean
The transmittal affects Medicare EDI transaction processing for entities submitting electronic claims or eligibility transactions through CMS front-end systems. The operational window is narrow, with implementation set for October 5, 2026. No changes to covered entity HIPAA compliance program obligations are indicated by this notice.
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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