Tox eff of corrosv alkalis & alk-like substnc, slf-hrm, sqla

This code signifies the long-term or residual effects resulting from a patient's deliberate ingestion or exposure to corrosive alkaline substances. These sequelae can manifest as chronic pain, strictures, scarring, or organ damage that persists after the initial acute injury has healed.

Apply this code when documenting conditions that are a direct consequence of a past intentional self-harm event involving corrosive alkalis, such as esophageal strictures years after a suicide attempt by drinking lye. It is used for follow-up care or treatment of these chronic complications, not for the initial acute poisoning.

• Always sequence this code after the code for the specific sequela (e.g., K22.2 for esophageal obstruction).
• Ensure documentation clearly links the current condition to a past intentional self-harm event involving corrosive alkalis.
• Do not use this code for acute toxic effects; refer to the appropriate acute poisoning codes for initial encounters.