The enzyme 4-hydroxyphenylpyruvate decarboxylase () catalyzes the chemical reaction
This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is 4-hydroxyphenylpyruvate carboxy-lyase (4-hydroxyphenylacetaldehyde-forming). This enzyme is also called 4-hydroxyphenylpyruvate carboxy-lyase.