§59-725.1.

§59-725.1.
   
   Every person who writes or prints, or causes to be written or printed,
   his name (whether or not the word "Doctor", or an abbreviation
   thereof, is used in connection therewith) in any manner in connection
   with such person in any manner engaging in, or in any manner holding
   himself out as engaging in, any of the branches of the healing art as
   defined in 59 O.S. 1951 Section 702, must append to his name so
   written or printed in the same size letters as his name appropriate
   and generally and easily understood words or letters, which clearly
   show and indicate the branch of the healing art in which he is
   licensed to practice and is engaged.