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ICD-10-CM · FY 2026 APRIL UPDATE

T21.4

Corrosion of unspecified 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
T21.40Corrosion of unspecified degree of trunk, unspecified siteCategory
T21.40XACorrosion of unspecified degree of trunk, unspecified site, initial encounterBillable
T21.40XDCorrosion of unspecified degree of trunk, unspecified site, subsequent encounterBillable
T21.40XSCorrosion of unspecified degree of trunk, unspecified site, sequelaBillable
T21.41Corrosion of unspecified degree of chest wallCategory
T21.41XACorrosion of unspecified degree of chest wall, initial encounterBillable
T21.41XDCorrosion of unspecified degree of chest wall, subsequent encounterBillable
T21.41XSCorrosion of unspecified degree of chest wall, sequelaBillable
T21.42Corrosion of unspecified degree of abdominal wallCategory
T21.42XACorrosion of unspecified degree of abdominal wall, initial encounterBillable
T21.42XDCorrosion of unspecified degree of abdominal wall, subsequent encounterBillable
T21.42XSCorrosion of unspecified degree of abdominal wall, sequelaBillable
T21.43Corrosion of unspecified degree of upper backCategory
T21.43XACorrosion of unspecified degree of upper back, initial encounterBillable
T21.43XDCorrosion of unspecified degree of upper back, subsequent encounterBillable
T21.43XSCorrosion of unspecified degree of upper back, sequelaBillable
T21.44Corrosion of unspecified degree of lower backCategory
T21.44XACorrosion of unspecified degree of lower back, initial encounterBillable
T21.44XDCorrosion of unspecified degree of lower back, subsequent encounterBillable
T21.44XSCorrosion of unspecified degree of lower back, sequelaBillable
T21.45Corrosion of unspecified degree of buttockCategory
T21.45XACorrosion of unspecified degree of buttock, initial encounterBillable
T21.45XDCorrosion of unspecified degree of buttock, subsequent encounterBillable
T21.45XSCorrosion of unspecified degree of buttock, sequelaBillable
T21.46Corrosion of unspecified degree of male genital regionCategory
T21.46XACorrosion of unspecified degree of male genital region, initial encounterBillable
T21.46XDCorrosion of unspecified degree of male genital region, subsequent encounterBillable
T21.46XSCorrosion of unspecified degree of male genital region, sequelaBillable
T21.47Corrosion of unspecified degree of female genital regionCategory
T21.47XACorrosion of unspecified 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.