ICD-10-CM
ICD-10 code for Wound, open thumb: S61.009
The ICD-10-CM index points "Wound, open thumb" to S61.009, Unspecified open wound of unspecified thumb without damage to nail. S61.009 is not billable on its own. Add the 7th character for the encounter, for example S61.009A, Unspecified open wound of unspecified thumb without damage to nail, initial encounter.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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