eilujs1999
New
Hopefully someone can help. I billed 99457 for the the first 20 minutes and 99458 for 20 additional minutes. But what if I need to bill for an 20 additional minutes on the same visit, do I use 99457 and 99458 x 2? Or do I use 99457, 99458, 99458 plus a modifier? I tried the 99457, 99458, 99458-25 and it paid for one of the 99458s. The other one was denied with an OA-18 denial code.