No, Kratom would have to be specifically tested for and Kratom is not on the standard 5-12 panel drug tests.
A twelve panel drug test is often administered as an extension to the 10 panel test and looks for either the presence of extended opiates and prescription painkillers, or can look for traces of other controlled substances. A standard 12 panel drug urine test typically looks for cocaine, marijuana, PCP, amphetamines, opiates, benzodiazepines, barbiturates, methadone, propoxyphene, Quaaludes, Ecstasy/MDA, & Oxycodone/Percoset.