Toxic effect of other metals, undetermined, sequela

This code signifies a long-term or residual health problem resulting from exposure to a toxic level of a metal other than mercury, arsenic, lead, or thallium. The specific metal involved is not identified in the documentation, and the sequela indicates that the acute phase of the poisoning has passed, but lasting effects remain.

Use this code when a patient presents with chronic symptoms or conditions directly attributable to a past, unspecified metal poisoning, and the acute toxic event is no longer active. Examples include persistent neurological deficits, organ damage, or dermatological issues that are documented as sequelae of such an exposure.

• Always sequence this code after the code for the specific sequela (e.g., chronic kidney disease, peripheral neuropathy).
• Ensure documentation clearly links the current condition to a past toxic metal exposure and specifies the "undetermined" nature of the metal if not otherwise specified.
• Verify that the encounter is for the long-term effects, not the acute poisoning, which would use an acute toxic effect code.