I'm sure there are JD's on this forum who can give you a more legal interpretation, but there are many types of powers of attorney. In the medical sense, there is a Durable Power of Attorney for Healthcare, which I have for my husband and mother, and my husband has for me. When this is activated, I, or the person for which it is written, can no longer make healthcare determinations. The person I have designated is the one I have trusted to make the decisions when I cannot. There are other powers of attorney - a general power of attorney - usually when a person is just this side of being conserved (unable to make any decisions for themselves & the court has approved a specific conservator) or it can be very specific - ie when one spouse must finalize the sale of the house & the other spouse has already moved. If the house (or other property, car, etc..) is in both names, both names must sign off the title - however, you can get a power of attorney for one unique circumstance - to authorize the sale of 12345 XYS St. Anywhere, USA. I have no idea what PA after an MD would signify, but I doubt it is power of attorney since that is for one individual only.