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ICD-10-CM · FY 2026 APRIL UPDATE

T25.4

Corrosion of unspecified degree of ankle and foot

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T25.41Corrosion of unspecified degree of ankleCategory
T25.411Corrosion of unspecified degree of right ankleCategory
T25.411ACorrosion of unspecified degree of right ankle, initial encounterBillable
T25.411DCorrosion of unspecified degree of right ankle, subsequent encounterBillable
T25.411SCorrosion of unspecified degree of right ankle, sequelaBillable
T25.412Corrosion of unspecified degree of left ankleCategory
T25.412ACorrosion of unspecified degree of left ankle, initial encounterBillable
T25.412DCorrosion of unspecified degree of left ankle, subsequent encounterBillable
T25.412SCorrosion of unspecified degree of left ankle, sequelaBillable
T25.419Corrosion of unspecified degree of unspecified ankleCategory
T25.419ACorrosion of unspecified degree of unspecified ankle, initial encounterBillable
T25.419DCorrosion of unspecified degree of unspecified ankle, subsequent encounterBillable
T25.419SCorrosion of unspecified degree of unspecified ankle, sequelaBillable
T25.42Corrosion of unspecified degree of footCategory
T25.421Corrosion of unspecified degree of right footCategory
T25.421ACorrosion of unspecified degree of right foot, initial encounterBillable
T25.421DCorrosion of unspecified degree of right foot, subsequent encounterBillable
T25.421SCorrosion of unspecified degree of right foot, sequelaBillable
T25.422Corrosion of unspecified degree of left footCategory
T25.422ACorrosion of unspecified degree of left foot, initial encounterBillable
T25.422DCorrosion of unspecified degree of left foot, subsequent encounterBillable
T25.422SCorrosion of unspecified degree of left foot, sequelaBillable
T25.429Corrosion of unspecified degree of unspecified footCategory
T25.429ACorrosion of unspecified degree of unspecified foot, initial encounterBillable
T25.429DCorrosion of unspecified degree of unspecified foot, subsequent encounterBillable
T25.429SCorrosion of unspecified degree of unspecified foot, sequelaBillable
T25.43Corrosion of unspecified degree of toe(s) (nail)Category
T25.431Corrosion of unspecified degree of right toe(s) (nail)Category
T25.431ACorrosion of unspecified degree of right toe(s) (nail), initial encounterBillable
T25.431DCorrosion of unspecified degree of right toe(s) (nail), subsequent encounterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.