Toxic effect of manganese and its compounds, undet, sequela

This code signifies the long-term or residual effects resulting from a past exposure to manganese or its compounds, where the intent of the exposure (e.g., accidental, intentional self-harm, assault) cannot be determined. These sequelae often manifest as neurological impairments, such as parkinsonism, cognitive deficits, or psychiatric disturbances, that persist after the acute toxic event has resolved.

Apply this code when documenting chronic health problems directly attributable to a previous manganese intoxication, and the circumstances surrounding the original exposure are unknown or unspecifiable. This is appropriate for patients presenting with persistent neurological or psychiatric symptoms years after a documented or suspected manganese exposure of undetermined intent. It should be used after the acute phase of the poisoning has passed.

• Always assign this code as a secondary diagnosis, following a code for the specific sequela (e.g., G21.4 for secondary parkinsonism due to other specified agents).
• Ensure documentation clearly links the current chronic condition to a past manganese exposure of undetermined intent.
• Do not use this code for acute manganese poisoning or when the intent of the exposure is known (e.g., accidental, intentional).