Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answer updated 2 months ago

According to some scholars in Iran, reiki is permissible.

In order to do reiki properly according to conventional methods, one does not recite anything except for a few words (which are optional and related to the technique), so reciting Qur'an here is not a factor. If one is relying on recitation of Qur'an or something else as the primary method, it is no longer reiki.

Of course there is no harm in reciting Qur'an or playing it in the background, and there is no harm in reciting Qur'an in the hope of or with the intent of healing.