According to TV Guide, the actress will play Allison in an upcoming episode of the show.
Allison is suffering from Alzheimer's and takes part in Derek's clinical trial.
Her 10-year-old son is taking care of her but Stark (Peter MacNicol) is unhappy about the situation and insists on calling social services.
Travis recently appeared as Mary Wagner in Desperate Housewives and starred as Susan on The Bill Engvall Show. She is also known for her role as Chris in Becker.
Grey's Anatomy returns for a new episode in the US on February 3 on ABC. The show continues in the UK on Wednesdays at 10pm on Living.
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