Look here Therapy Dogs International
Jasper is a therapy dog, Lilah is not. I really think that it has more to do with the temperament of the dog. Specific training was minimal for Jasper as he is a natural and loves his "work". I would discuss your plans with your breeder and they should be able to help you get a puppy with the right temperament.
As a team, Jasper and I visit a local dementia ward regularly and next month starting R.E.A.D at one of our elementary schools Read Team Steps
I hope to finish the Hospice workshop soon. Good luck building your team