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ICD-10-CM 2027 diagnosis code

W65.XXXAAccidental drowning and submersion while in bath-tub, initial encounter

✓ Billable / specificRequires 7th character

W65.XXXA is a valid, billable ICD-10-CM code for accidental drowning and submersion while in bath-tub, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Accidental drowning and submersion while in bath-tub, 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 W65.XXXA

W65.XXXA is the ICD-10-CM diagnosis code for accidental drowning and submersion while in bath-tub, initial encounter. It belongs to category W65 (accidental drowning and submersion while in bath-tub), 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 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 E910.4 (accidental drowning and submersion in bathtub).

7th character

Ainitial encounter

Other encounter types for W65:

Notes that apply from higher levels

Instructions written at a parent level also apply to W65.XXXA.

› From W65 Accidental drowning and submersion while in bath-tub
Excludes1
  • accidental drowning and submersion due to fall in (into) bathtub (W16.211)

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 →
  • E910.4Accidental drowning and submersion in bathtubapproximate

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 W65.XXXA

Is W65.XXXA billable?

Yes. W65.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 W65.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 W65.XXXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict W65.XXXA as a principal diagnosis.

Is W65.XXXA a CC or MCC?

No. W65.XXXA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for W65.XXXA?

The CMS General Equivalence Mappings map W65.XXXA to ICD-9-CM E910.4.