If you are writing of listing his official title: e.g.
**The Most Reverend David R. Choby, D.D.
Bishop of The Diocese of Nashville
**list any doctorate degrees after last name.
If you are meeting him and talking with him for the first time:
Your Excellency, Bishop Choby… (if introducing him to someone it is His Excellency, Bishop Choby
(if he is an Archbishop…it is Your Grace, (or His Grace), Bishop Choby
then in initial conversation Bishop Choby…
then just saying Bishop (I like to refer to them, if in Catholic circles, as “Your Excellency” vice just “Bishop”…seems more respectful of who they really are to me… and it does not breed a sense of familiarity or casualness …no matter how close or friendly you may be with the Bishop…or avoids any hint of displeasure with him if upset with him over some issue you are bringing to him for adjudication…and he rules not in your favor.
(This is my understanding):…Remember without a Bishop…there is no Church…and no sacraments in your area…the Bishop is the Church Head (Vicar of Christ in your area)…no head…we, the Body, (the rest of us) dies. The priests only have power to celebrate the Church liturgy and administer sacraments through the Bishop’s power and authority. When a bishop dies or retires…even when a replacement has not been installed…there is a always a bishop assigned to be the Administrator/Overseer…for validity for liturgy and sacraments.
The title for** Cardinal** is Your Eminence or His Eminence.
Pax Christi