I'm pretty sure that it needs a KX modifier, plus you can't have NU and RR on the same claim.
Also, I have been noticing that, in region A anyway, they are asking for extra narrative for equipment used on equipment that is still renting, like your wheelchair. For example, I recently had to add extra narrative for A7003, nebulizer cup & tubing, stating that pt is renting E0570. Anything to avoid paying a claim in a timely manner.
Hope this helps!
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