If you are in talking terms with your wife, there is no harm in you talking to her which may reconcile the difference of opinions between you both.As far as precautions is concerned, you should not get sentimentally broken due to which you may experience emotional outbursts. Such outbursts may cause you danger which may trigger fresh criminal complaints against you, so be alert on what you do and talk and have a self control over all such feelings and to venture beyond what is required to be spoken.
If she reciprocates, you can talk to her over phone but remember she may be recording your call, so better be in your limits while conversing with her over phone.
Taking mediclaim for her also is your choice, she has neither compelled you nor she has availed any benefit out if it. In fact it is you who will be availing tax benefits out of it, so better decide wisely about it to avoid confrontation in this regard.