Use of LT and RT modifiers

[CCO-support]

Are there any rules of thumb regarding when to use the modifiers for -LT and -RT? For example, according to the answer key for the Workbook exercises Chapter 27 #41 and 43:
69320_LT is used for Myringoplasty of the left ear.
69661 (without _LT) is used for Left stapedectomy with footplate drill out.
This seems to arbitrary to me and I never know when to use these modifiers even though clearly there are Left and Right ear drums and Left and Right stapes.

 

[Ruth Sheets]

As Laureen explained in the July 2012 Medical Coding Certification Q & A Webinar, use -LT and -RT whenyou need to distinguish from Left and Right. The use of these modifiers is often based on the payer requirements.

For more information, view the Q & A webinars by visiting www.cco.us and click on Q and A Webinar Replay link.