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ICD-10-CM 2027 diagnosis code

S27.31Primary blast injury of lung

Not billable — use a more specific codeRequires 7th character

S27.31 is a header code, so it can't be reported by itself. Choose one of the 3 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 S27.31

S27.31 is the ICD-10-CM diagnosis code for primary blast injury of lung. It belongs to category S27 (injury of other and unspecified intrathoracic organs), 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 3 subcodes must be used instead.

Within S27.3 (other and unspecified injuries of lung), S27.31 is specifically for primary blast injury of lung. Related codes cover unspecified injury of lung (S27.30), contusion of lung (S27.32), laceration of lung (S27.33) and other injuries of lung (S27.39).

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 S27

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Coding notes

Applicable toConditions and synonyms classified to this code
  • Blast injury of lung NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to S27.31.

› From S27 Injury of other and unspecified intrathoracic organs
Excludes2
  • injury of cervical esophagus (S10-S19)
  • injury of trachea (cervical) (S10-S19)
Code also
  • any associated open wound of thorax (S21.-)

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

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about S27.31

Is S27.31 billable?

No. S27.31 is a header code. Report one of its more specific subcodes instead.