beis hamikdash - If a Kohen donates a kidney is he considered a Bal Moom for purposes of doing an Avodah?

If a Kohen donates a kidney, is he considered a Bal Moom for purposes of doing an Avodah in the future Bais hamikdash? On the one hand, the missing organ is not visible. On the other hand, a cataract is also not visible and I think it would make a Kohen a baal moom.