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Dx

ICD-10-CM 2027 diagnosis code

W18.1Fall from or off toilet

Not billable — use a more specific codeRequires 7th character

W18.1 is a header code, so it can't be reported by itself. Choose one of the 2 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 W18.1

W18.1 is the ICD-10-CM diagnosis code for fall from or off toilet. 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 a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within W18 (other slipping, tripping and stumbling and falls), W18.1 is specifically for fall from or off toilet. Related codes cover fall due to bumping against object (W18.0), fall in (into) shower or empty bathtub (W18.2), other and unspecified fall on same level (W18.3) and slipping, tripping and stumbling without falling (W18.4).

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 W18

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to W18.1.

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

Codes whose notes reference W18.1

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 W18.1

Is W18.1 billable?

No. W18.1 is a header code. Report one of its more specific subcodes instead.