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ICD-10-CM 2027 diagnosis code

X79.XXXSIntentional self-harm by blunt object, sequela

✓ Billable / specificRequires 7th character

X79.XXXS is a valid, billable ICD-10-CM code for intentional self-harm by blunt object, sequela. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 X79.XXXS

X79.XXXS is the ICD-10-CM diagnosis code for intentional self-harm by blunt object, sequela. It belongs to category X79 (intentional self-harm by blunt object), block X71-X83 (intentional self-harm) and chapter 20 (external causes of morbidity). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

The 7th character "S" means sequela: use it for complications or conditions that arise as a direct result of the original condition.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

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

Before ICD-10, this condition was coded in ICD-9-CM as E959 (late effects of self-inflicted injury).

7th character

Ssequela

Other encounter types for X79:

Notes that apply from higher levels

Instructions written at a parent level also apply to X79.XXXS.

Broader instructions also apply from X71-X83 Intentional self-harm and Chapter 20: External causes of morbidity.

ICD-9-CM equivalent

Converter →
  • E959Late effects of self-inflicted injuryapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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 X79.XXXS

Is X79.XXXS billable?

Yes. X79.XXXS is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "S" at the end of X79.XXXS mean?

It is the 7th character for sequela. Per the official guidelines, use it for complications or conditions that arise as a direct result of the original condition.

Can X79.XXXS be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict X79.XXXS as a principal diagnosis.

Is X79.XXXS a CC or MCC?

No. X79.XXXS is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for X79.XXXS?

The CMS General Equivalence Mappings map X79.XXXS to ICD-9-CM E959.