Toxic effect of caustic alkalis

This code signifies the adverse systemic or local effects resulting from exposure to caustic alkaline substances. These effects can range from chemical burns to internal organ damage, depending on the route and extent of exposure. It describes the toxic reaction of the body to these corrosive chemicals.

Assign this code when a patient presents with symptoms or injuries directly attributable to contact with or ingestion of a strong alkaline substance. Documentation should clearly state exposure to a caustic alkali and the resulting toxic effect, such as esophageal burns from lye or skin necrosis from industrial cleaners.

• Always code the specific manifestation of the toxic effect first (e.g., chemical burn, esophagitis).
• Distinguish from toxic effects of acids, which are coded elsewhere.
• Ensure documentation specifies "caustic alkali" rather than just "chemical" for accurate coding.