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ICD-10-CM · FY 2026 APRIL UPDATE

S90.44

External constriction of toe

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
S90.441External constriction, right great toeCategory
S90.441AExternal constriction, right great toe, initial encounterBillable
S90.441DExternal constriction, right great toe, subsequent encounterBillable
S90.441SExternal constriction, right great toe, sequelaBillable
S90.442External constriction, left great toeCategory
S90.442AExternal constriction, left great toe, initial encounterBillable
S90.442DExternal constriction, left great toe, subsequent encounterBillable
S90.442SExternal constriction, left great toe, sequelaBillable
S90.443External constriction, unspecified great toeCategory
S90.443AExternal constriction, unspecified great toe, initial encounterBillable
S90.443DExternal constriction, unspecified great toe, subsequent encounterBillable
S90.443SExternal constriction, unspecified great toe, sequelaBillable
S90.444External constriction, right lesser toe(s)Category
S90.444AExternal constriction, right lesser toe(s), initial encounterBillable
S90.444DExternal constriction, right lesser toe(s), subsequent encounterBillable
S90.444SExternal constriction, right lesser toe(s), sequelaBillable
S90.445External constriction, left lesser toe(s)Category
S90.445AExternal constriction, left lesser toe(s), initial encounterBillable
S90.445DExternal constriction, left lesser toe(s), subsequent encounterBillable
S90.445SExternal constriction, left lesser toe(s), sequelaBillable
S90.446External constriction, unspecified lesser toe(s)Category
S90.446AExternal constriction, unspecified lesser toe(s), initial encounterBillable
S90.446DExternal constriction, unspecified lesser toe(s), subsequent encounterBillable
S90.446SExternal constriction, unspecified lesser toe(s), 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.