I think there could be a good chance of finding this man, but I think some of your assumptions may be incorrect.
The Bavarian Jubilee Medal with LD1 is a very common combination in Bavarian senior medics, but surprisingly the RA4 and PK3 combination is not common at all.
Indeed in the 1914 Bavarian Militar Handbuch I can only find one amongst the medics Oberstabsarzt Johann Hausmann and I believe I have his bar, which is very similar to yours, except that the PK3 has been removed.
My guy was still attached to the Bavarians so got the King Ludwig.
I believe your guy could well be a Medic in the Bavarian Army born around 1860 retired before the War, probably just after 1905, was either from Lippe or still a practising Medic there who did War work. Hence he got the Prussian Hilfdienst and Lippe and the EK2 on non combattant.
Very few Bavarians received the Prussian Centenary Medal.
He could well have died before 1934, hence no FEK.
Just my take on the bar, I will look into it later and check it out.
Regards
Pete