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ICD-10-CM 2027 diagnosis code

W18.00XAStriking against unspecified object with subsequent fall, initial encounter

✓ Billable / specificRequires 7th character

W18.00XA is a valid, billable ICD-10-CM code for striking against unspecified object with subsequent fall, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Striking against unsp object w subsequent fall, init encntr

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 W18.00XA

W18.00XA is the ICD-10-CM diagnosis code for striking against unspecified object with subsequent fall, initial encounter. It belongs to category W18 (other slipping, tripping and stumbling and falls), block W00-W19 (slipping, tripping, stumbling and falls) 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 "A" means initial encounter: use it while the patient is receiving active treatment for the 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 E888.1 (fall resulting in striking against other object).

7th character

Ainitial encounter

Other encounter types for W18.00:

Notes that apply from higher levels

Instructions written at a parent level also apply to W18.00XA.

› From W18.0 Fall due to bumping against object
Excludes1
  • fall on same level due to slipping, tripping, or stumbling with subsequent striking against object (W01.1-)

Broader instructions also apply from W00-W19 Slipping, tripping, stumbling and falls and Chapter 20: External causes of morbidity.

ICD-9-CM equivalent

Converter →
  • E888.1Fall resulting in striking against other objectapproximate

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 W18.00XA

Is W18.00XA billable?

Yes. W18.00XA is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of W18.00XA mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can W18.00XA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict W18.00XA as a principal diagnosis.

Is W18.00XA a CC or MCC?

No. W18.00XA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for W18.00XA?

The CMS General Equivalence Mappings map W18.00XA to ICD-9-CM E888.1.