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ICD-10-CM · FY 2026 APRIL UPDATE

T21.7

Corrosion of third 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
T21.70Corrosion of third degree of trunk, unspecified siteCategory
T21.70XACorrosion of third degree of trunk, unspecified site, initial encounterBillable
T21.70XDCorrosion of third degree of trunk, unspecified site, subsequent encounterBillable
T21.70XSCorrosion of third degree of trunk, unspecified site, sequelaBillable
T21.71Corrosion of third degree of chest wallCategory
T21.71XACorrosion of third degree of chest wall, initial encounterBillable
T21.71XDCorrosion of third degree of chest wall, subsequent encounterBillable
T21.71XSCorrosion of third degree of chest wall, sequelaBillable
T21.72Corrosion of third degree of abdominal wallCategory
T21.72XACorrosion of third degree of abdominal wall, initial encounterBillable
T21.72XDCorrosion of third degree of abdominal wall, subsequent encounterBillable
T21.72XSCorrosion of third degree of abdominal wall, sequelaBillable
T21.73Corrosion of third degree of upper backCategory
T21.73XACorrosion of third degree of upper back, initial encounterBillable
T21.73XDCorrosion of third degree of upper back, subsequent encounterBillable
T21.73XSCorrosion of third degree of upper back, sequelaBillable
T21.74Corrosion of third degree of lower backCategory
T21.74XACorrosion of third degree of lower back, initial encounterBillable
T21.74XDCorrosion of third degree of lower back, subsequent encounterBillable
T21.74XSCorrosion of third degree of lower back, sequelaBillable
T21.75Corrosion of third degree of buttockCategory
T21.75XACorrosion of third degree of buttock, initial encounterBillable
T21.75XDCorrosion of third degree of buttock, subsequent encounterBillable
T21.75XSCorrosion of third degree of buttock, sequelaBillable
T21.76Corrosion of third degree of male genital regionCategory
T21.76XACorrosion of third degree of male genital region, initial encounterBillable
T21.76XDCorrosion of third degree of male genital region, subsequent encounterBillable
T21.76XSCorrosion of third degree of male genital region, sequelaBillable
T21.77Corrosion of third degree of female genital regionCategory
T21.77XACorrosion of third 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.