OMD is already taken - Doctor of Oriental Medicine
I'm perfectly fine w/ the letters DO.
Unfortunately the osteopaths in other countries (non-USA) also use the abbreviation DO (diplomat of Osteopathy) so there is confusion among the public and reluctance w/ foreign government in granting full practice rights to US-trained DOs.
Anyway, letters don't mean a thing - like the change from LLB to JD - didn't change a thing.
But I would consider getting a Doctor of Oriental History degree. Then I could be
Group Theory, DOH
or
Group Theory, D'OH
or
Group Theory, D'oh!!!
hehe - that would be cool 🙂
OR get a optometry degree after medical school
Group Theory, DOOD
hehe - just showing how ridiculous the letters after the name is 🙂