We reviewed the logic of standards concepts deprecation.
So far when the source removes the concept from list of the active concepts, we deprecate it, and it doesn’t matter what is the reason of deprecation:
incorrect concept - duplicate, having wrong description (e.g. wrong drug dosage), some weird classification branch, etc.
correct, but outdated for the other reasons
for example CPT4 in the last release makes “76645 | Ultrasound of breasts” concept outdated (maybe it’s not a billing code anymore, because you need to specify some other details), or this one: “97001 | Physical therapy evaluation”, and also there are more granular concepts.
But the thing is that these procedure really happened and these codes exist in a patient data for a years and might be included in a protocols, concepts sets, etc. So it’s totally OK to have them in a data as a standard concepts.
The proposal is to keep these concepts standard and active for CPT4, HCPCS and other vocabularies with the same out-dating principles. And “resurrect” them in our vocabularies making invalid_reason = null and standard_concept =‘S’