Okla. Stat. tit. 59, § 59-731.2: Use of word "Doctor" or abbreviation "Dr.", etc. as

evidence.

A. Proof that any class of persons identified in Section 725.2

of this title appends to their name the word "Doctor", the

abbreviation "Dr.", or any other word, abbreviation or designation,

which word, abbreviation or designation, indicate that such person

is qualified for diagnosis or treatment, as herein defined, shall

constitute prima facie evidence that such person is holding himself

or herself out, within the meaning of Sections 731.1 through 731.6

of this title, as qualified to engage in diagnosis or treatment.

B. Nothing in this section shall be construed to prevent a

person specified in paragraphs 7 through 10 of subsection A of

Section 725.2 of this title from appending to such person's name the

word "Doctor", so long as such person follows such name and

designation with the letters signifying the recognized doctoral

degrees specified in paragraphs 7 through 10 of subsection A of

Section 725.2 of this title.