T23.121S
ICD-10-CMBurn of first degree of single right finger (nail) except thumb, sequela
This code indicates a healed first-degree burn affecting a single finger on the right hand, excluding the thumb, where the burn has resulted in a lasting effect or complication. A first-degree burn involves only the outermost layer of skin, causing redness and pain, but no blistering. The "sequela" designation signifies that the acute injury has resolved, but there are residual issues related to the burn.
Use this code when documenting a patient presenting with a long-term consequence of a first-degree burn to a single right finger (not the thumb), such as permanent discoloration, altered sensation, or minor scar tissue formation. This code is appropriate for follow-up visits addressing these chronic effects, not for the initial acute burn treatment. It should be applied when the acute phase of the burn has passed and the patient is being treated for the lasting impact.
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