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S93.40

⚠ Non-billable (Header)

Sprain of unspecified ligament of ankle

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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Also Known As

Sprain of ankle NOSSprained ankle NOS

⚠️ Excludes2

inherited from S93.4

Rules from parent category S93.4: Sprain of ankle

  • • injury of Achilles tendon (S86.0-)

Child Codes (3)

S93.401Sprain of unspecified ligament of right ankleS93.402Sprain of unspecified ligament of left ankleS93.409Sprain of unspecified ligament of unspecified ankle

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Code Information

CodeS93.40
BillableNo — Header code
ParentS93.4
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes10 rule(s)
Excludes21 note(s)
Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)