• Modifiers and ICD-10 code laterality

    Question: Are modifiers -RT and -LT still required for CPT codes or is the laterality of ICD-10 sufficient?

    Answer: Continue to use modifiers -RT and -LT on CPT codes. Not every ICD-10 code has laterality. Some diagnoses have just one code. When both the CPT and the diagnosis code require laterality, be sure to link right eye to right eye and left eye to left eye.