CMS Pub. 100-04, ch. 1, § 50.1.8

A3-3305.2, A3-3305.3

Whenever the last day for timely filing of a claim falls on a Saturday, Sunday, legal

holiday, or other day all or part of which is a non-work-day for Federal employees

because of Federal statute or executive order, the claim will be considered timely if it is

filed on the next workday.

Where the claim is submitted to the carrier by mail, if it is material and to the advantage

of the provider, the claim can be considered filed on the day the envelope was

postmarked in the United States. Thus, where an undated claim is received by the carrier

in the mail early in the month after the filing date, the envelope should, if practical, be

retained. If, in such a case, an envelope with a legible postmark is not available, a 7-day

tolerance will usually apply. For example, a claim for services provided in May 2000

received by a carrier on or before January 10, 2002, may be presumed by the carrier, in

the absence of evidence to the contrary, to have been mailed on or before January 2,

2002, (which is the date the time limit expires because it is the first Federal workday after

Saturday, December 31). This rule will be applicable where the claim was mailed within

the contiguous 48 States and the District of Columbia and received by a carrier within

such States. In other cases, the reasonable tolerance may be longer and will depend on

the usual mailing time under the particular circumstances.