No Could be a D mint mark with a small die chip which makes it appear like a P Or maybe it is a P.. Tilted? What year is it? Can you please show a picture of the entire Obverse? Do you know how Mint Marks were done in certain years?
It's a 1991P. Mint marks were incorporated into the die then so it could not have been repunched or altered by the mint. Just looks normal to me!