Corros first degree of unsp single finger except thumb, subs

This code signifies a first-degree burn, specifically a corrosion, affecting a single finger (excluding the thumb) where the exact finger is not specified. A first-degree burn involves only the epidermis, causing redness and mild pain without blistering. The "subsequent encounter" indicates this is not the initial treatment for the injury.

This code is appropriate for follow-up visits or continuing care for a chemical burn that has caused superficial damage to an unspecified finger. It would be used when the patient presents for wound checks, dressing changes, or pain management after the initial treatment of the corrosion.

• Ensure the documentation clearly states "corrosion" or "chemical burn" and specifies a first-degree injury to a single finger other than the thumb.
• Verify that the encounter is for follow-up care, not the initial treatment, to justify the "D" seventh character.
• If the specific finger is identified (e.g., index finger, middle finger), a more specific code should be used.