Temporal sclerosis

This code represents a neurological condition characterized by atrophy and scarring of the hippocampus, a structure within the temporal lobe of the brain. It is often associated with chronic, intractable epilepsy, particularly temporal lobe epilepsy. The sclerosis can lead to cognitive impairments, especially memory deficits.

Assign this code when documentation explicitly states "temporal sclerosis" as a diagnosis, often identified through neuroimaging (e.g., MRI) or neuropathological examination. It is frequently seen in patients undergoing evaluation or treatment for focal seizures originating in the temporal lobe.

• Do not confuse with other forms of cerebral atrophy; this code is specific to the temporal lobe.
• Always code the underlying epilepsy (e.g., G40.109, G40.209) as the primary diagnosis when temporal sclerosis is the cause or associated condition.
• Ensure documentation specifies "temporal" sclerosis; generalized cerebral atrophy would be coded differently.