Do standard employment drug test check for oxycodone?

The standard 5-drug, or NIDA, test, will not detect oxycodone. However, unless you ask, and that would be stupid, there is no way of knowing which kind of drug test a particular employer uses. I know specifically of an employer that uses the standard test BUT adds a screen for hydrocodone (Vicodin). The only way to be sure you will pass is to submit a clean sample.