All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu 'alyhi wa sallam, is His slave and Messenger.
If treatment of magic is confined to using Sharee‘ah-approved Athkaar (mentionings of Allaah) and herbal medicine, then it is permissible. However, if the therapist uses charms, summons Jinn or resorts to any other prohibited method, then it is impermissible to go to this man.
For further information, see Fataawa 4310, 13249 and 18831.
And Allaah Knows best.