T23.449

Billable code

Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb

The ICD-10 code for corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb is T23.449.

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•Laterality-specific codes exist for this condition — confirm the affected side is documented.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.