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ICD-10-CM · FY 2026 APRIL UPDATE

T21.5

Corrosion of first degree of trunk

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
T21.50Corrosion of first degree of trunk, unspecified siteCategory
T21.50XACorrosion of first degree of trunk, unspecified site, initial encounterBillable
T21.50XDCorrosion of first degree of trunk, unspecified site, subsequent encounterBillable
T21.50XSCorrosion of first degree of trunk, unspecified site, sequelaBillable
T21.51Corrosion of first degree of chest wallCategory
T21.51XACorrosion of first degree of chest wall, initial encounterBillable
T21.51XDCorrosion of first degree of chest wall, subsequent encounterBillable
T21.51XSCorrosion of first degree of chest wall, sequelaBillable
T21.52Corrosion of first degree of abdominal wallCategory
T21.52XACorrosion of first degree of abdominal wall, initial encounterBillable
T21.52XDCorrosion of first degree of abdominal wall, subsequent encounterBillable
T21.52XSCorrosion of first degree of abdominal wall, sequelaBillable
T21.53Corrosion of first degree of upper backCategory
T21.53XACorrosion of first degree of upper back, initial encounterBillable
T21.53XDCorrosion of first degree of upper back, subsequent encounterBillable
T21.53XSCorrosion of first degree of upper back, sequelaBillable
T21.54Corrosion of first degree of lower backCategory
T21.54XACorrosion of first degree of lower back, initial encounterBillable
T21.54XDCorrosion of first degree of lower back, subsequent encounterBillable
T21.54XSCorrosion of first degree of lower back, sequelaBillable
T21.55Corrosion of first degree of buttockCategory
T21.55XACorrosion of first degree of buttock, initial encounterBillable
T21.55XDCorrosion of first degree of buttock, subsequent encounterBillable
T21.55XSCorrosion of first degree of buttock, sequelaBillable
T21.56Corrosion of first degree of male genital regionCategory
T21.56XACorrosion of first degree of male genital region, initial encounterBillable
T21.56XDCorrosion of first degree of male genital region, subsequent encounterBillable
T21.56XSCorrosion of first degree of male genital region, sequelaBillable
T21.57Corrosion of first degree of female genital regionCategory
T21.57XACorrosion of first degree of female genital region, initial 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.

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