ICD-10-CM 2027 diagnosis code
W74.XXXAUnspecified cause of accidental drowning and submersion, initial encounter
W74.XXXA is a valid, billable ICD-10-CM code for unspecified cause of accidental drowning and submersion, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Unsp cause of accidental drowning and submersion, init
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 W74.XXXA
W74.XXXA is the ICD-10-CM diagnosis code for unspecified cause of accidental drowning and submersion, initial encounter. It belongs to category W74 (unspecified cause of accidental drowning and submersion), block W65-W74 (accidental non-transport drowning and submersion) 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 E910.9 (unspecified accidental drowning or submersion).
7th character
Ainitial encounter
Other encounter types for W74:
Notes that apply from higher levels
Instructions written at a parent level also apply to W74.XXXA.
Broader instructions also apply from W65-W74 Accidental non-transport drowning and submersion and Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E910.9Unspecified accidental drowning or submersionapproximate
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 W74.XXXA
Is W74.XXXA billable?
- Yes. W74.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 W74.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 W74.XXXA be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict W74.XXXA as a principal diagnosis.
Is W74.XXXA a CC or MCC?
- No. W74.XXXA is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for W74.XXXA?
- The CMS General Equivalence Mappings map W74.XXXA to ICD-9-CM E910.9.