ICD-10-CM 2027 diagnosis code

S25.0Injury of thoracic aorta

Not billable — use a more specific codeRequires 7th character

S25.0 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S25.0

S25.0 is the ICD-10-CM diagnosis code for injury of thoracic aorta. It belongs to category S25 (injury of blood vessels of thorax), block S20-S29 (injuries to the thorax) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within S25 (injury of blood vessels of thorax), S25.0 is specifically for injury of thoracic aorta. Related codes cover innominate or subclavian artery (S25.1), superior vena cava (S25.2), innominate or subclavian vein (S25.3), pulmonary blood vessels (S25.4), intercostal blood vessels (S25.5), other blood vessels of thorax (S25.8) and unspecified blood vessel of thorax (S25.9).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

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

Ainitial encounter
Dsubsequent encounter
Ssequela

Coding notes

Applicable toConditions and synonyms classified to this code

Injury of aorta NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to S25.0.

› From S25 Injury of blood vessels of thorax

Code also

any associated open wound (S21.-)

Broader instructions also apply from S20-S29 Injuries to the thorax and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference S25.0

S35.0Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about S25.0

Is S25.0 billable?: No. S25.0 is a header code. Report one of its more specific subcodes instead.