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Laterality of diagnoses and the OMOP CDM


(Vojtech Huser) #1

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”)


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