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ICD-10-CM · FY 2026 APRIL UPDATE

S99.9

Unspecified injury of 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
S99.91Unspecified injury of ankleCategory
S99.911Unspecified injury of right ankleCategory
S99.911AUnspecified injury of right ankle, initial encounterBillable
S99.911DUnspecified injury of right ankle, subsequent encounterBillable
S99.911SUnspecified injury of right ankle, sequelaBillable
S99.912Unspecified injury of left ankleCategory
S99.912AUnspecified injury of left ankle, initial encounterBillable
S99.912DUnspecified injury of left ankle, subsequent encounterBillable
S99.912SUnspecified injury of left ankle, sequelaBillable
S99.919Unspecified injury of unspecified ankleCategory
S99.919AUnspecified injury of unspecified ankle, initial encounterBillable
S99.919DUnspecified injury of unspecified ankle, subsequent encounterBillable
S99.919SUnspecified injury of unspecified ankle, sequelaBillable
S99.92Unspecified injury of footCategory
S99.921Unspecified injury of right footCategory
S99.921AUnspecified injury of right foot, initial encounterBillable
S99.921DUnspecified injury of right foot, subsequent encounterBillable
S99.921SUnspecified injury of right foot, sequelaBillable
S99.922Unspecified injury of left footCategory
S99.922AUnspecified injury of left foot, initial encounterBillable
S99.922DUnspecified injury of left foot, subsequent encounterBillable
S99.922SUnspecified injury of left foot, sequelaBillable
S99.929Unspecified injury of unspecified footCategory
S99.929AUnspecified injury of unspecified foot, initial encounterBillable
S99.929DUnspecified injury of unspecified foot, subsequent encounterBillable
S99.929SUnspecified injury of unspecified foot, sequelaBillable

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.