ICD10CM adds laterality and that can be beneficial for some analyses.
Unlike ICD10CM, the ICD9CM did not have separate concepts. (I am not sure about non-CM ICD world)
This icd9CM concept of https://athena.ohdsi.org/search-terms/terms/44837028 =
Nonexudative senile macular degeneration
is mapped to SNOMED term of
https://athena.ohdsi.org/search-terms/terms/372629 = Nonexudative age-related macular degeneration
All nice and good.
But here comes the proposal.
I would like to propose to change some mappings for ICD10CM.
Currently, they “live in the ICD9CM style” and are mapped to non-lateral concepts. (I did not do a super comprehensive research, just few examples).
We can keep that old style mapping in place but can we perhaps add mapping to a side specific SNOMED concept.
So the SNOMED term
https://athena.ohdsi.org/search-terms/terms/761142 =
Age-related exudative macular degeneration of right eye
would become the ‘non standard to standard map’ of this to this side specific ICD10CM concept.
https://athena.ohdsi.org/search-terms/terms/37200404 = Exudative age-related macular degeneration, right eye, stage unspecified
Currently this last term mentioned (ICD10CM code
H35.3210 ) somewhat loses granularity by the standard OMOP mapping.
(please don’t “declare it a feature and not a bug”)