Iowa Code § 154B.4: Acts prohibited.

Commencing July 1, 1975, a person who is not licensed under this chapter shall not claim to be a licensed practicing psychologist, use a title or description, including the term “psychology” or any of its derivatives, such as “psychologist”, “psychological”, “psychotherapist” or modifiers such as “practicing” or “licensed” in a manner which implies that the person is certified under this chapter, or offer to practice or practice psychology, except as otherwise permitted in this chapter. The use by a person who is not licensed under this chapter of such terms is not prohibited by this chapter, except when such terms are used in connection with an offer to practice or the practice of psychology.