Where to Report Modifiers on the Hospital Part B Claim

20.6.1 - Where to Report Modifiers on the Hospital Part B Claim (Rev. 11937; Issued: 03-31-23; Effective: 04-01-23; Implementation: 04-03-23) Modifiers are reported on the hardcopy Form CMS-1450 with the HCPCS code. See Chapter 25 of this manual for related instructions. For electronic submissions, see the ASC X12 837 Institutional Claim implementation guide for instructions related to HCPCS modifiers when using the ASC X12 837 institutional claim format. Note there is space for four modifiers on the hardcopy and electronic forms. HOPDs are reminded that the most specific modifier should be used first. That is, when modifiers E1 through E4, FA through F9, LC, LD, RC, and TA through T9 apply, they should be used before modifiers LT, RT, or 59.