ICD10 Urine Drug Screening

I'm trying to make a list of some of the more common nursing diagnosis codes for our clinic. We do a urine drug screening on most of the pregnant women. We are testing for meth, marijuana, etc... I don't know if they have a dependence, even if positive. They may be an occasional user, non-dependent. And if its negative, there is definitely no dependence. We screen urine, not blood. I'm hitting non-truths in every code I find. Any suggestions?

Thanks!!!!

ICD10 Urine Drug Screening