AHA Coding Clinic® for ICD-9 - 2004 Issue 3; Ask the Editor

Dementia Secondary to Lithium

An elderly patient is admitted to the hospital with confusion and the final diagnosis is dementia secondary to Lithium toxicity. The Alphabetic Index classifies dementia due to drugs, to code 292.82, Drug-induced dementia. Should we be coding a symptom instead with the E code for adverse effect of a drug?We are having the same scenario with a patient who is experiencing hallucinations secondary to a drug reaction. This is classified to code 292.12, Drug-induced hallucinosis. ...

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