42 CFR §408.68
- (a)Payment by check. The premium is considered paid if the check is paid by the bank the first or second time it is presented for payment.
- (b)Payment within the grace period.
- (1)A premium is considered paid within the grace period if it is delivered personally, or mailed on or before the last day of that period.
- (2)A premium payment is considered to have been mailed 7 days before it is received by CMS.