Corrosion of first degree of left toe(s) (nail), sequela

This code signifies a permanent or long-term complication resulting from a first-degree corrosion injury to the left toe(s), including the nail. Corrosion, often caused by chemical exposure, leads to tissue damage. A first-degree injury typically involves superficial damage to the epidermis.

This code is appropriate when documenting a residual condition or late effect directly attributable to a past first-degree chemical burn of the left toe(s). Examples include chronic discoloration, scarring, or nail deformity that persists after the initial acute injury has healed. It should be used for follow-up encounters addressing these long-term sequelae.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., a code for scar or nail dystrophy).
• Ensure documentation clearly links the current condition to a past first-degree corrosion injury of the left toe(s).
• Verify that the "S" seventh character is appropriate, indicating a sequela, and not an initial encounter or subsequent encounter for the acute injury.