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T25.42

Non-billable

Corrosion of unspecified degree of foot

T25.42 is the ICD-10-CM code for Corrosion of unspecified degree of foot. It is a non-billable category code — use a more specific child code such as T25.421 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Parent
T25.4
Subcodes
3
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

Excludes2 — not included here

  • •corrosion of unspecified degree of toe(s) (nail) (T25.43-)

Frequently asked questions

What is ICD-10 code T25.42?
T25.42 is the ICD-10-CM code for "Corrosion of unspecified degree of foot". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is T25.42 a billable code?
No — T25.42 is a non-billable header code. Use a more specific child code (such as T25.421) for billing.
What are the subcodes of T25.42?
T25.42 has 3 more specific child codes, including T25.421, T25.422, T25.429.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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