Corros unsp degree of unsp single finger except thumb, subs

This code signifies a chemical burn of an unspecified severity affecting a single finger (excluding the thumb) or its nail, encountered during a follow-up visit. The injury is due to corrosive substances, and the specific degree of the burn is not documented.

Apply this code for subsequent encounters when a patient presents for ongoing care, such as wound checks, dressing changes, or medication refills, related to a chemical burn of a single finger (not the thumb) where the initial encounter did not specify the burn's degree. This is appropriate when the documentation confirms a corrosive injury but lacks detail on the depth of tissue damage.

• Ensure documentation clearly indicates a subsequent encounter for the corrosion.
• Verify that the affected digit is a single finger, excluding the thumb, and that the degree of corrosion is unspecified.
• Do not use if the degree of corrosion (e.g., first, second, third degree) is specified in the medical record.