S65.409A Unspecified injury of blood vessel of unspecified thumb, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S65.409 with 7th character A (initial encounter).

Applies from S65 Injury of blood vessels at wrist and hand level

Code also

• any associated open wound (S61.-)

7th character note

• The appropriate 7th character is to be added to each code from category S65

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S65.409A

Back-references to S65

• Type 2 Excludes: S55 Injury of blood vessels at forearm level ("injury of blood vessels at wrist and hand level (S65.-)")

Nearby codes

• S65.402 Unspecified injury of blood vessel of left thumb
• S65.402A Unspecified injury of blood vessel of left thumb, initial encounter
• S65.402D Unspecified injury of blood vessel of left thumb, subsequent encounter
• S65.402S Unspecified injury of blood vessel of left thumb, sequela
• S65.409 Unspecified injury of blood vessel of unspecified thumb
• S65.409A Unspecified injury of blood vessel of unspecified thumb, initial encounter (this code)
• S65.409D Unspecified injury of blood vessel of unspecified thumb, subsequent encounter
• S65.409S Unspecified injury of blood vessel of unspecified thumb, sequela
• S65.41 Laceration of blood vessel of thumb
• S65.411 Laceration of blood vessel of right thumb
• S65.411A Laceration of blood vessel of right thumb, initial encounter