A81.00
BillableCreutzfeldt-Jakob disease, unspecified
HCC Category Mapping
V28HCC 127 — Dementia, Mild or Unspecified
0.464RxHCCHCC 112 — Dementia and Other Specified Brain Disorders
0.000What This Code Means
Creutzfeldt-Jakob disease (CJD) is a rare, rapidly progressive brain disorder caused by abnormal proteins called prions that destroy brain tissue. This code is used when the specific type or variant of CJD has not been determined.
Coding Tips
- •If the type of CJD is documented (sporadic, familial, iatrogenic, or variant), use the more specific subcategories A81.01-A81.09 rather than the unspecified code A81.00
- •CJD is a reportable disease in most jurisdictions; verify local public health reporting requirements and ensure proper documentation of disease progression and clinical presentation
Clinical Significance
Creutzfeldt-Jakob disease is a rapidly progressive, uniformly fatal prion disease that causes devastating neurological decline within months. The unspecified code should prompt a provider query to determine the type (sporadic, familial, iatrogenic, or variant), as this affects surveillance, family counseling, and public health reporting.
Documentation Requirements
- ✓Diagnostic criteria met: rapidly progressive dementia with at least two of myoclonus, visual/cerebellar disturbances, pyramidal/extrapyramidal features, or akinetic mutism
- ✓Diagnostic testing results: brain MRI (diffusion-weighted imaging abnormalities), EEG (periodic sharp wave complexes), CSF 14-3-3 protein or RT-QuIC assay
- ✓Stage of disease documented (early cognitive, progressive, or terminal)
- ✓Type of CJD if known (sporadic, familial, iatrogenic, variant) — query if not documented
- ✓Public health reporting documentation
Commonly Confused Codes
A81.01 (Variant Creutzfeldt-Jakob disease) — vCJD is specifically linked to bovine spongiform encephalopathy exposure; use A81.00 only when the specific type is unknownA81.09 (Other Creutzfeldt-Jakob disease) — For familial or iatrogenic CJD subtypes not fitting the standard or variant categoriesG30.9 (Alzheimer disease, unspecified) — Early CJD may mimic Alzheimer but progresses much faster (months vs. years); distinguish by rate of decline and diagnostic testingF03.90 (Unspecified dementia without behavioral disturbance) — CJD causes dementia but is a specific prion disease, not an unspecified dementia
Code Hierarchy
└A81Atypical virus infections of central nervous system└A81.0Creutzfeldt-Jakob disease└A81.00Creutzfeldt-Jakob disease, unspecified
└A81.00Creutzfeldt-Jakob disease, unspecified