US · guidance
CMS Pub. 100-01, ch. 7, § 50.4.3
Effective Date
The effective date identified in a change request (CR) is the date on which any new rules, laws,
processes and/or policies become active.
Beginning on this date, Medicare contractors shall apply the new rules to process Medicare
claims according to their updated business processes and supporting technology.
The effective date is normally a mandated date resulting from legislation or a regulation. In the
case of National Coverage Determinations (NCDs), the effective date is the first day the item or
service that is the subject of the NCD is covered nationally under the Medicare Program.
Effective dates are not always future dates; sometimes, they are in the past. When this happens,
the Centers for Medicare and Medicaid Services (CMS) instructs contractors, using business
requirements, how to process claims for the period between the effective date and the
implementation date. Typically, the effective date is the first day of any given fiscal year quarter
or the first day of the month.
History
(Rev. 66, Issued: 01-07-11, Effective: 02-08-11, Implementation: 02-08-11)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
e24c6b78e887f978f4237c313096029c4687be35e10df430f5fcc9539c213798
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