Modifiers indicate that a service or procedure performed has been altered by some specific circumstance, but not changed in its definition or code. They are used to add information or change the description of service to improve accuracy or specificity.

What does patient modifier mean?

A modifier is a code that provides the means by which the reporting physician can indicate that a service or procedure that has been performed has been altered by some specific circumstance but has not changed in its definition or code.

What modifiers are not accepted by Medicare?

Medicare will automatically reject claims that have the –GX modifier applied to any covered charges. Modifier –GX can be combined with modifiers –GY and –TS (follow up service) but will be rejected if submitted with the following modifiers: EY, GA, GL, GZ, KB, QL, TQ.