T25.499 Corrosion of unspecified degree of multiple sites of unspecified ankle and foot

The ICD-10-CM code for Corrosion of unspecified degree of multiple sites of unspecified ankle and foot is T25.499 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

19: Injury, poisoning and certain other consequences of external causes (S00-T88)

Section

T20-T25: Burns and corrosions of external body surface, specified by site (T20-T25)

Category T25

137 codes (96 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T25.499:

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › lower › limb › multiple sites, except ankle and foot › ankle and foot

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool

Cite This Page

Reference T25.499 with the canonical source and edition:

T25.499 — Corrosion of unspecified degree of multiple sites of unspecified ankle and foot. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/T25.499

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