Yes, of course this is Faustina - that's pretty obvious. However there were 2 Faustinae, the wives of Antoninus Pius and Marcus Aurelius respectively. This is the 2nd, also known as "Faustina Junior". She and Marcus Aurelius were married in 145 AD. while he was still Caesar under Antoninus Pius and raised to the rank of Augusta in 147. So her coinage exists in several phases: those struck by Antoninus Pius before, then after becoming Augusta, those struck by Marcus Aurelius during her life, and those struck in her honor posthumously. she and Marcus evidently had a closer relationship than that enjoyed by most Imperial couples - Faustina accompanied or visited him throughout his military career in far-flung outposts while fighting the Germans. For this, she became known as "Matri Castrorum" - "Mother of the Camps". This piece was struck by Marcus Aurelius while she was still living, sometime between his elevation to Augustus in 161 and her death in 175. The reverse type, which is a bit hard to read in its present condition is "SALVS" - the allegorical personification of Salus ("health", but as in "the Health of the Empire" or "of the body-public", etc.) seated left feeding a serpent arising from a low altar at her feet. This is a pretty obscure reference for us at this remove in time, but it was full of important symbolism for the Romans. Whether at that point in time it was still occurring that the Vestals and/or other faithful Roman women fed actual serpents in ceremonies from which all men were banned, I don't know. Ceremonies of this type were important well into the Imperatorial era. However, the image of this ceremony remained a part of the Roman psyche and symbolized the "Purity" or "Virtue" of the Empire to the extent that it could interact with serpents and not be harmed.
Catalog - RIC III, 714 (of Marcus Aurelius), RSC 195, SR 5262.
Mark