On a Kanji website, "healer" is read as "isha". So I suppose that's its meaning in Japanese.
Source:
http://www.kanjisymbol.net/mean/healer.HTML
A word "isha" means "a doctor" in Japanease and we do not call a doctor "healer" nowadays, since "healer" has something to do with spirituality and no license is required while a doctor must hold his/her license to provide his medical skills.
I assumed that you meant the word "healer" such as reiki masters, and in the sense, I would use the word " reiki wo tsukau hito" (reiki user).
There is another word used more in general, "iyashi(healing)-kei(traits)" 癒し系.
This person's carachter, atmosphere, voice, appearance and etc. relaxs and heals you by practically doing nothing.
Naoko Iijima is a good example of iyashi-kei when she appeared on Georgia coffee ads.
Even though one iyashi-kei could be a healer to some people, yet he/she could be an annoyance to others at the same time.
It is all up to the chemical or spirit match.
いやす人
iyasuhito
What is the word 'Honorable' when translated from English to Japanese.
The word drag when translated from English to Japanese is hipparu.
The word sick when translated from English to Japanese is mukatsuku.
The word 'maple' when translated from English to Japanese is カエデ.
There is no equivalent word in Japanese for the English word "a."
The word crown when translated from English to Japanese is oukan or kuraun.
The word listener when translated from English to Japanese is kikite or risuna.
The word 'champion' when translated from English to Japanese is チャンピオン (champion).
Of= No in Japanese
There's no such word in Japanese.
Tsuki when translated from English to Japanese means "moon".
The word life when translated from English to Japanese:itonamiukiyoseimeiinochijinsei