S.D. Codified Laws § 47-11A-4
The name of a corporation formed under § 47-11A-1 shall contain the words "professional company" or "professional corporation" or abbreviations thereof, such as "Prof. Co.," "Prof. Corp.", "P.C.", or "PC". The name of a limited liability company formed under § 47-11A-1 shall contain the words "professional limited liability company" or the abbreviation "Prof. L.L.C.", "Prof. LLC", "P.L.L.C.", or "PLLC". In addition, the name of the corporation or limited liability company shall always meet the ethical standards established for the names of chiropractic firms by the canons of professional ethics of the South Dakota Chiropractors Association as if all the stockholders of the corporation or members of the limited liability company were partners.
SDCL 47-11A-4