In simple words: This refers to memory loss and related cognitive problems caused by another medical condition. The specific level of severity of the dementia (mild, moderate, or severe) isn't specified by this code.

This code represents dementia that occurs as a result of another underlying disease or physiological condition.The severity of the dementia is not specified.Conditions that may cause this type of dementia include Alzheimer's disease, cerebral lipidosis, Creutzfeldt-Jakob disease, epilepsy, HIV, Huntington's disease, hypothyroidism, lupus, multiple sclerosis, Parkinson's disease, traumatic brain injury, and vitamin deficiencies, among others. The underlying physiological condition should be coded first.

Example 1: A patient with a confirmed diagnosis of Huntington's disease (G10) is exhibiting progressive cognitive decline, including memory loss and difficulty with executive function. The dementia is not yet severe enough to warrant a moderate or severe classification., A patient with long-term hypothyroidism (E03.9) begins to experience memory problems and other cognitive deficits.Testing reveals dementia, but the severity is not clearly defined as mild, moderate, or severe., A patient with a history of traumatic brain injury (S06.90XD) presents with gradual onset of dementia. The dementia symptoms do not yet fall neatly into mild, moderate, or severe classifications.

Documentation should clearly link the dementia to the underlying physiological condition.Detailed clinical findings related to the dementia, including cognitive assessments, are crucial.The extent of functional impairment due to the dementia should be documented to support the assigned severity level, if specified.

** It is important to differentiate this code from other dementia codes, such as those specific to Alzheimer's disease (G30.-), vascular dementia (F01.-), or other specified dementias. The choice of code depends entirely on the underlying cause and documented features of the dementia.