RT and LT Modifier Use - Effective March 1, 2019 Date of Service
Do you bill for claims that require the RT and LT modifier?
Effective for claims with dates of service (DOS) on or after 3/1/2019, suppliers must bill each item on two separate claim lines using the RT and LT modifiers and 1 UOS on each claim line. Do not use the combination RTLT modifier on the same claim line and bill with 2 units of service (UOS). Claim lines for HCPCS codes requiring use of the RT and LT modifiers, billed without the RT and/or LT modifiers or with the RTLT on a single claim line, will be rejected as incorrect coding. See the Correct Coding - RT and LT Modifier Usage Change DMD article.
Last Updated Mar 05, 2019