4-hydroxyphenylpyruvate dioxygenase activity p-hydroxyphenylpyruvate oxidase activity GO:0003868 p-hydroxyphenylpyruvate hydroxylase activity Reactome:REACT_77319 MetaCyc:4-HYDROXYPHENYLPYRUVATE-DIOXYGENASE-RXN Reactome:REACT_101650 Reactome:REACT_94777 p-hydroxyphenylpyruvate dioxygenase activity Reactome:REACT_33537 Reactome:REACT_85018 p-hydroxyphenylpyruvic acid hydroxylase activity Reactome:REACT_77991 4-hydroxyphenylpyruvate:oxygen oxidoreductase (hydroxylating, decarboxylating) Reactome:REACT_29808 molecular_function RHEA:16192 UM-BBD_reactionID:r0298 Reactome:REACT_95395 Catalysis of the reaction: 4-hydroxyphenylpyruvate + O2 = homogentisate + CO2. Reactome:REACT_92448 EC:1.13.11.27 4-hydroxyphenylpyruvate hydroxylase activity Reactome:REACT_99639 Reactome:REACT_93903 Reactome:REACT_1145 p-hydroxyphenylpyruvic hydroxylase activity 4-hydroxyphenylpyruvic acid dioxygenase activity p-hydroxyphenylpyruvic oxidase activity Reactome:REACT_86998 Reactome:REACT_81665 Reactome:REACT_33740 oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen