Other Creutzfeldt-Jakob disease

This code represents a rare, rapidly progressive, and invariably fatal neurodegenerative disorder characterized by spongiform changes in the brain. It is a transmissible spongiform encephalopathy (TSE) caused by an abnormal prion protein, leading to dementia, ataxia, and myoclonus. This specific code is for forms of Creutzfeldt-Jakob disease (CJD) that do not fit into the more specific categories of familial, iatrogenic, or variant CJD.

Use this code for patients diagnosed with CJD where the specific etiology (e.g., genetic, acquired through medical procedures, or variant form) is not identified or documented. This applies to sporadic CJD, which accounts for the majority of cases, or other unspecified forms. Documentation should clearly state a diagnosis of CJD without further specification of its type.

• Differentiate from familial CJD (A81.01), iatrogenic CJD (A81.02), and variant CJD (A81.03) based on documented etiology.
• Always review the medical record for any indication of the specific type of CJD before assigning this unspecified code.
• Code any associated neurological manifestations, such as dementia (e.g., F02.80, F02.81) or ataxia (R27.0), as secondary diagnoses.