You might have experienced the situation where you needed to group your drug products of interest to a higher level class, and decided to use the OMOP vocabulary relationships to ATC classification, but either the vocabulary lacks the correct relationship or the mapping does not exist. A simple join of ingredient to ATC 5th level may not also work well in some cases because ATC classes are not only about active ingredient name, but also dosage form, drug strength, route of administration, and other characterizations of the product. It has been discussed for a long time in emails, on the forum (#800, #2815, #3556) and the GitHub repo (#114, #121).
To address this issue, we would like to initiate the ATC Mapping Working Group to, once and for all, comprehensively assess and fix ATC relationships in the OMOP vocabulary. The goal is to develop the best approach to map concepts to ATC classes, and provide ATC mapping for all Drug concepts. For more information, visit the working group page on wiki.
We welcome everyone to join this effort. If you are interested, please leave a comment below, and fill out the doodle poll by April 27, 2018 to schedule the first meeting.