Golden week again?!? How many weeks are they going to make golden in Japanese....lol

Anyways question:

Can a Shinigami with healing abilities (i.e. hanataro or w/e his name was) heal a human being in the human world? Like with Reiatsu/Kidou? Bakudo worked on Ichigo when he was a human and encountered Rukia for the first time, so maybe Isshin could use his reiatsu healing techniques to heal people as opposed to going to med school. I always took him more for a community clinic rather than a doctor, like a very good first aid tech or a chinese pharmacy or something not really requiring certification