Corros first degree of single l finger except thumb, sqla

This code signifies a first-degree chemical burn, also known as corrosion, affecting a single finger on the left hand, excluding the thumb. The injury specifically involves the nail or nail bed and is documented as a long-term complication or residual effect of the initial corrosion.

Use this code when a patient presents with a sequela, such as nail deformity, discoloration, or chronic pain, resulting from a past first-degree chemical burn to a single left finger (not the thumb) involving the nail. This code is appropriate for follow-up encounters addressing these persistent issues.

• Ensure documentation clearly states the injury is a "sequela" of a first-degree corrosion.
• Verify the affected digit is a single left finger, excluding the thumb, and that the nail is involved.
• Do not use for acute or initial encounters; this code is exclusively for late effects.