S25.399A Other specified injury of unspecified innominate or subclavian vein, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S25.399 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 S25.399A

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

• S25.392 Other specified injury of left innominate or subclavian vein
• S25.392A Other specified injury of left innominate or subclavian vein, initial encounter
• S25.392D Other specified injury of left innominate or subclavian vein, subsequent encounter
• S25.392S Other specified injury of left innominate or subclavian vein, sequela
• S25.399 Other specified injury of unspecified innominate or subclavian vein
• S25.399A Other specified injury of unspecified innominate or subclavian vein, initial encounter (this code)
• S25.399D Other specified injury of unspecified innominate or subclavian vein, subsequent encounter
• S25.399S Other specified injury of unspecified innominate or subclavian vein, sequela
• S25.4 Injury of pulmonary blood vessels
• S25.40 Unspecified injury of pulmonary blood vessels
• S25.401 Unspecified injury of right pulmonary blood vessels