Corros unsp degree of single l finger except thumb, sqla

This code signifies a long-term complication or late effect resulting from a chemical burn (corrosion) to a single finger on the left hand, excluding the thumb. The specific degree of the original burn is not documented or is unknown. This sequela could manifest as scarring, contracture, chronic pain, or functional impairment.

This code is appropriate when a patient presents with a current condition directly attributable to a past chemical burn on a single left finger (not the thumb), and the acute phase of the injury has passed. It should be used for follow-up care, rehabilitation, or management of chronic issues stemming from the original corrosion.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela (e.g., scar, contracture).
• Ensure documentation clearly links the current condition to a previous chemical burn of an unspecified degree on the specified finger.
• Do not use this code for acute chemical burns; those require codes from the T23.0-T23.3 series.