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ICD-10-CM · FY 2026 APRIL UPDATE

T24.4

Corrosion of unspecified degree of lower limb, except 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
T24.40Corrosion of unspecified degree of unspecified site of lower limb, except ankle and footCategory
T24.401Corrosion of unspecified degree of unspecified site of right lower limb, except ankle and footCategory
T24.401ACorrosion of unspecified degree of unspecified site of right lower limb, except ankle and foot, initial encounterBillable
T24.401DCorrosion of unspecified degree of unspecified site of right lower limb, except ankle and foot, subsequent encounterBillable
T24.401SCorrosion of unspecified degree of unspecified site of right lower limb, except ankle and foot, sequelaBillable
T24.402Corrosion of unspecified degree of unspecified site of left lower limb, except ankle and footCategory
T24.402ACorrosion of unspecified degree of unspecified site of left lower limb, except ankle and foot, initial encounterBillable
T24.402DCorrosion of unspecified degree of unspecified site of left lower limb, except ankle and foot, subsequent encounterBillable
T24.402SCorrosion of unspecified degree of unspecified site of left lower limb, except ankle and foot, sequelaBillable
T24.409Corrosion of unspecified degree of unspecified site of unspecified lower limb, except ankle and footCategory
T24.409ACorrosion of unspecified degree of unspecified site of unspecified lower limb, except ankle and foot, initial encounterBillable
T24.409DCorrosion of unspecified degree of unspecified site of unspecified lower limb, except ankle and foot, subsequent encounterBillable
T24.409SCorrosion of unspecified degree of unspecified site of unspecified lower limb, except ankle and foot, sequelaBillable
T24.41Corrosion of unspecified degree of thighCategory
T24.411Corrosion of unspecified degree of right thighCategory
T24.411ACorrosion of unspecified degree of right thigh, initial encounterBillable
T24.411DCorrosion of unspecified degree of right thigh, subsequent encounterBillable
T24.411SCorrosion of unspecified degree of right thigh, sequelaBillable
T24.412Corrosion of unspecified degree of left thighCategory
T24.412ACorrosion of unspecified degree of left thigh, initial encounterBillable
T24.412DCorrosion of unspecified degree of left thigh, subsequent encounterBillable
T24.412SCorrosion of unspecified degree of left thigh, sequelaBillable
T24.419Corrosion of unspecified degree of unspecified thighCategory
T24.419ACorrosion of unspecified degree of unspecified thigh, initial encounterBillable
T24.419DCorrosion of unspecified degree of unspecified thigh, subsequent encounterBillable
T24.419SCorrosion of unspecified degree of unspecified thigh, sequelaBillable
T24.42Corrosion of unspecified degree of kneeCategory
T24.421Corrosion of unspecified degree of right kneeCategory
T24.421ACorrosion of unspecified degree of right knee, initial encounterBillable
T24.421DCorrosion of unspecified degree of right knee, 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.