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How is delirium (without dementia) identified in ICD10CM?

(Gerald Pulver) #1

While the standard (WHO) version of ICD10 differentiates between delirium superimposed on dementia F05.1 and Delirium NOT superimposed on dementia F05.0, there is apparently no such granularity in ICD10CM. It is not clear to me, therefore, how I would differentiate between the two conditions, based on condition occurrence.

My only thought so far is to assume that in the absence of a co-morbidity which suggests dementia, I should assume that and ICD10CM code of F05 is equivalent to the ICD10 code of F05.0.


(Dmytry Dymshyts) #2

Right, F05 stands for Delirium due to known physiological condition (any known cause except alcoholic),
and ICD10CM code of F05 includes Delirium superimposed on dementia as well.

I suggest, to find patients with Dementia and Delirum you need to search for both diagnoses.
Something like: the patient should have at least two codes for Dementia (to be sure it is not a mistake) and then any time after dementia diagnosis - Delirium diagnosis.
Please let me know if this approach works for you.