F02.1 exists in the World Health Organization's base ICD-10 classification, but was never adopted into ICD-10-CM (the United States clinical modification used for medical billing). It cannot be used on a US claim. Reference information from the official WHO classification is shown below.
Code
F02.1
Title
A81.0 Dementia in Creutzfeldt-Jakob disease
Definition
A progressive dementia with extensive neurological signs, due to specific neuropathological changes that are presumed to be caused by a transmissible agent. Onset is usually in middle or later life, but may be at any adult age. The course is subacute, leading to death within one to two years.
Source: WHO ICD-10 (International Statistical Classification of Diseases and Related Health Problems, 10th Revision)