S25.309A Unspecified injury of unspecified innominate or subclavian vein, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S25.309 with 7th character A (initial encounter).

Applies from S25 Injury of blood vessels of thorax

Code also

• any associated open wound (S21.-)

7th character note

• The appropriate 7th character is to be added to each code from category S25

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 S25.309A

Back-references to S25.3

• Type 2 Excludes: S45 Injury of blood vessels at shoulder and upper arm level ("injury of subclavian vein (S25.3)")

Nearby codes

• S25.302 Unspecified injury of left innominate or subclavian vein
• S25.302A Unspecified injury of left innominate or subclavian vein, initial encounter
• S25.302D Unspecified injury of left innominate or subclavian vein, subsequent encounter
• S25.302S Unspecified injury of left innominate or subclavian vein, sequela
• S25.309 Unspecified injury of unspecified innominate or subclavian vein
• S25.309A Unspecified injury of unspecified innominate or subclavian vein, initial encounter (this code)
• S25.309D Unspecified injury of unspecified innominate or subclavian vein, subsequent encounter
• S25.309S Unspecified injury of unspecified innominate or subclavian vein, sequela
• S25.31 Minor laceration of innominate or subclavian vein
• S25.311 Minor laceration of right innominate or subclavian vein
• S25.311A Minor laceration of right innominate or subclavian vein, initial encounter