ICD-10-CM 2027 diagnosis code
W28.XXXAContact with powered lawn mower, initial encounter
W28.XXXA is a valid, billable ICD-10-CM code for contact with powered lawn mower, initial encounter. 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 W28.XXXA
W28.XXXA is the ICD-10-CM diagnosis code for contact with powered lawn mower, initial encounter. It belongs to category W28 (contact with powered lawn mower), block W20-W49 (exposure to inanimate mechanical forces) 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 is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
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 E920.0 (accidents caused by powered lawn mower).
7th character
Ainitial encounter
Other encounter types for W28:
Notes that apply from higher levels
Instructions written at a parent level also apply to W28.XXXA.
Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E920.0Accidents caused by powered lawn mowerapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
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 W28.XXXA
Is W28.XXXA billable?
- Yes. W28.XXXA 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 W28.XXXA 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 W28.XXXA be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict W28.XXXA as a principal diagnosis.
Is W28.XXXA a CC or MCC?
- No. W28.XXXA is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for W28.XXXA?
- The CMS General Equivalence Mappings map W28.XXXA to ICD-9-CM E920.0.