Medicare Claims Processing Manual (Pub. 100-04), Ch. 32 § 60.8.2
Medicare Summary Notice (MSN) Messages
60.8.2 - Medicare Summary Notice (MSN) Messages
(Rev. 1562, Issued: 07-25-08, Effective: 03-19-08, Implementation: 08-25-08)
If denying services furnished after July 1, 2002, use MSN message:
“The following policies [190.11] were used when we made this decision.” (MSN Message 15.20)