Effective 1/1/20, if more than 10% of a visit is provided by a PTA or COTA - we must append the CQ or CO modifier to all lines for Medicare patients.
It is anticipated that by 2021, lines with the appended CQ or CO modifier will be reduced by up to 8%
CQ modifier: Outpatient physical therapy services furnished in whole or in part by a
physical therapist assistant.
CO modifier: Outpatient occupational therapy services furnished in whole or in part
by an occupational therapy assistant.