Mo. Rev. Stat. § 632.425

The physician-patient privilege recognized by section 491.060 and the psychologist-patient privilege recognized by section 337.055 shall be deemed waived in detention proceedings under this chapter. The fact that such privileges have been waived pursuant to this section does not by itself waive the privileges in any other proceeding, civil or criminal. The waiver of the privileges shall extend only to that evidence which is directly material and relevant to detention proceedings.