Medicare Urine drug screen codes

I know the urine drug screen HCPCS codes have changed for 2015. How do I find a Medicare fee for the G6056 opiates & is that the correct code for the urine drug test?
That code is not listed on the Medicare fee schedule.

re: Medicare Urine drug screen codes

G6056 is on the lab fee schedule for CMS @ this link;
http://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/ClinicalLabFeeSched/clinlab.html