Mo. Rev. Stat. § 345.075

Any person who practices or holds himself or herself out to be a speech-language pathologist, speech-language pathology assistant or aide, audiologist or audiology aide without first having been licensed or registered is guilty of a class B misdemeanor and, upon conviction, shall be punished as provided by law. This section shall refer also to the use of the words "pathologist", "state-licensed clinic", "state registered", "state certified", "state approved", or any other term, abbreviation, or symbol when it would falsely give the impression that service is being provided by persons trained in medicine, speech-language pathology or audiology or that the licensee's service has been recommended by the state.