It's not a repeat test, a repeat test is when something went wrong with the first, so you do it again.
It's a second test, you are testing for two types of Flu, type A and type B.. We have trouble getting paid too, we bill 87804 and 87804 XU, or to Medicare 87804QW and 87804 QWXU, and some get paid and some don't. Sometimes you just have to call the ins and explain the situation. If you have one where it did pay before, tell them, and that gives you leverage.