Are either of the debts being reported on his CRs? If so, read
here.
If not, contact the healthcare provider and speak to the billing dept. Ask them if they have any outstanding bills on your dh. If they try to refer you to the CA, tell them you refuse to deal with collection agencies.
At least this way you can find out if you actually owe the bill. It is possible that they didn't submit to insurance correctly. A lot of times that's what medical collections end up being.