Radiology Coding Alert

Reader Questions:

Consider MUEs, CPT® Guidelines for Laterality Modifier Denials

Question: Why might I be receiving a denial for frequency when submitting two units of a 19083 with modifiers LT and RT to Medicare?

Tennessee Subscriber

Answer: The bilateral surgery indicator of “1” indicates you can bill 19083 (Biopsy, breast, with placement of breast localization device(s) (eg, clip, metallic pellet), when performed, and imaging of the biopsy specimen, when performed, percutaneous; first lesion, including ultrasound guidance) as a bilateral procedure. However, if you refer back to question “Look to CPT® Rules When Handling 19083, +19084 Denials,” you’ll see that the CPT® book instructs you to report one unit of 19083 for bilateral services. You will report one or more units of +19084 (…each additional lesion, including ultrasound guidance (List separately in addition to code for primary procedure) for the contralateral breast and all additional lesions.

Furthermore, you can see that 19083 has a MUE of 1, which means that only one unit of 19083 may be submitted to the payer on a given date of service (DOS).

A submission of 19083 on separate lines with modifiers LT (Left Side) and RT (Right Side) will result in a flag in the Medicare system for invalid CPT® code frequency. In some instances, you may override denials such as this by submitting the code with modifier 50 (Bilateral Procedure), instead. However, as the CPT® guidelines state, that would be incorrect in this example.