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

This code signifies a long-term complication or late effect resulting from a chemical burn to the left toe(s), including the nail. It indicates that the acute injury has healed, but residual issues related to the corrosion persist. The specific degree of the initial chemical burn is not documented or is unknown.

Apply this code when a patient presents with a current condition or symptom that is a direct consequence of a past chemical burn to their left toe(s). This includes situations where the initial injury occurred more than a year ago, or when the acute phase of the corrosion has resolved, but the patient is still experiencing related problems. Examples include chronic pain, scarring, nail deformity, or impaired function directly attributable to the prior chemical exposure.

• Requires a seventh character "S" to indicate a sequela, meaning the current condition is a residual effect of a healed injury.
• Do not use for acute chemical burns; those require codes from the T25.4 series without the "S" seventh character.
• Always code the specific nature of the sequela (e.g., scar, chronic pain, deformity) first, followed by this code to indicate the cause.