I can't see why it wouldn't show up, afaik oxymorphone still metabolizes into morphine, which is what these tests look for.
Agree with TWIZZ Standard 5-panel screens for: Amphetamines (including Methamphetamine, "Crystal Meth") Cannabinoids (THC, Marijuana) Cocaine Metabolites(Crack) Opiates (codeine and morphine) Phencyclidine (PCP).