How often do ICD codes reflect the actual diagnosis in EHR?
Electronic health records (EHRs) often contains ICD codes used for billing purpose. Is there any study/survey that looked at how often ICD codes in EHRs reflect the actual diagnosis?
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In many cases they do reflect the actual diagnosis.
It depends on the disease in question.
eMerge network work on validation is for example here: www.ncbi.nlm.nih.gov/pmc/articles/PMC3715338. In that study, they used ICD-based definitions but also other available data.
Similar work in diabetes mellitus diagnosis is also published (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4416392/)
Validation research tries to arrive at positive predictive value. E.g., www.ncbi.nlm.nih.gov/pubmed/30480162 In Japan, the PPV for AMI was 82.5%. (https://www.ncbi.nlm.nih.gov/pubmed/30477501)
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