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ICD-10-CM · FY 2026 APRIL UPDATE

S21.0

Open wound of breast

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
S21.00Unspecified open wound of breastCategory
S21.001Unspecified open wound of right breastCategory
S21.001AUnspecified open wound of right breast, initial encounterBillable
S21.001DUnspecified open wound of right breast, subsequent encounterBillable
S21.001SUnspecified open wound of right breast, sequelaBillable
S21.002Unspecified open wound of left breastCategory
S21.002AUnspecified open wound of left breast, initial encounterBillable
S21.002DUnspecified open wound of left breast, subsequent encounterBillable
S21.002SUnspecified open wound of left breast, sequelaBillable
S21.009Unspecified open wound of unspecified breastCategory
S21.009AUnspecified open wound of unspecified breast, initial encounterBillable
S21.009DUnspecified open wound of unspecified breast, subsequent encounterBillable
S21.009SUnspecified open wound of unspecified breast, sequelaBillable
S21.01Laceration without foreign body of breastCategory
S21.011Laceration without foreign body of right breastCategory
S21.011ALaceration without foreign body of right breast, initial encounterBillable
S21.011DLaceration without foreign body of right breast, subsequent encounterBillable
S21.011SLaceration without foreign body of right breast, sequelaBillable
S21.012Laceration without foreign body of left breastCategory
S21.012ALaceration without foreign body of left breast, initial encounterBillable
S21.012DLaceration without foreign body of left breast, subsequent encounterBillable
S21.012SLaceration without foreign body of left breast, sequelaBillable
S21.019Laceration without foreign body of unspecified breastCategory
S21.019ALaceration without foreign body of unspecified breast, initial encounterBillable
S21.019DLaceration without foreign body of unspecified breast, subsequent encounterBillable
S21.019SLaceration without foreign body of unspecified breast, sequelaBillable
S21.02Laceration with foreign body of breastCategory
S21.021Laceration with foreign body of right breastCategory
S21.021ALaceration with foreign body of right breast, initial encounterBillable
S21.021DLaceration with foreign body of right breast, 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.