How do you punctuate doctors titles after name?

Sr., Jr., Ph.D., M.D., B.A., M.A., D.D.S.

These are standard abbreviations, with periods. The APA Publication Manual recommends not using periods with degrees; other reference manuals do recommend using periods, so use your own judgment on this issue. All sources advise against using titles before and after a name at the same time (i.e., she can be Dr. Juanita Espinoza or Juanita Espinoza, PhD, but she cannot be Dr. Juanita Espinoza, PhD). And we do not abbreviate a title that isn't attached to a name: "We went to see the doctor (not dr.) yesterday.