|This comprehensive resource covers both laboratory and pathology services, using plain language to simplify even the most complex concepts. And MedLearn Publishing has updated it to reflect all the changes for 2017 . including the rewrite of codes for clinical drug testing. You can depend on this go-to guide for answers to all your coding, billing and compliance questions. ... UPDATED FOR 2017, including: Rewrite of codes for clinical drug testing and other 2017 code updates. .New guidance in billing successfully for drug testing. Payment packaging for laboratory services. The NCCI and how it applies to the billing of code pairs, unit of service limits and use of modifiers. New FAQs and answers.