Corrosion of left eye and adnexa, part unspecified, sequela

This code indicates a long-term or late-effect complication resulting from a chemical burn or corrosion affecting the left eye and its surrounding structures. The specific part of the eye or adnexa that was corroded is not identified. This represents the residual damage after the acute injury has healed.

Apply this code when documenting a chronic condition or permanent damage to the left eye and/or adnexa that is directly attributable to a past corrosive exposure. This is appropriate for conditions like corneal scarring, eyelid deformities, or chronic conjunctivitis that are sequelae of a chemical burn. It should be used after the initial acute injury has been treated and the patient is presenting for management of the lasting effects.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., H17.12 for corneal scarring of the left eye).
• Ensure documentation clearly links the current eye condition to a previous corrosive injury.
• The "S" in the 7th character indicates a sequela, meaning the patient is seen for complications or conditions that arise directly from the original injury, not the acute injury itself.