US lawFederal (United States)Agency guidanceCMS Medicare Internet-Only ManualsPub. 100-04Chapter 52Medicare Claims Processing Manual (Pub. 100-04), Ch. 5 § 2ModifierLength: 5 wordsOfficial source 2 – Modifier 6-7 X(02)NextMedicare Claims Processing Manual (Pub. 100-04), Ch. 5 § 3