Skip to content
Dx

ICD-10-CM 2027 diagnosis code

W16.221AFall in (into) bucket of water causing drowning and submersion, initial encounter

✓ Billable / specificRequires 7th character

W16.221A is a valid, billable ICD-10-CM code for fall in (into) bucket of water causing drowning and submersion, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Fall in (into) bucket of water causing drown, 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 W16.221A

W16.221A is the ICD-10-CM diagnosis code for fall in (into) bucket of water causing drowning and submersion, initial encounter. It belongs to category W16 (fall, jump or diving into water), 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 E883.0 (accident from diving or jumping into water [swimming pool]).

7th character

Ainitial encounter

Other encounter types for W16.221:

Notes that apply from higher levels

Instructions written at a parent level also apply to W16.221A.

› From W16 Fall, jump or diving into water
Excludes1
  • accidental non-watercraft drowning and submersion not involving fall (W65-W74)
  • effects of air pressure from diving (W94.-)
  • fall into water from watercraft (V90-V94)
  • hitting an object or against bottom when falling from watercraft (V94.0)
Excludes2
  • striking or hitting diving board (W21.4)

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

ICD-9-CM equivalent

Converter →
  • E883.0Accident from diving or jumping into water [swimming pool]approximate

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 W16.221A

Is W16.221A billable?

Yes. W16.221A 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 W16.221A 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 W16.221A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict W16.221A as a principal diagnosis.

Is W16.221A a CC or MCC?

No. W16.221A is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for W16.221A?

The CMS General Equivalence Mappings map W16.221A to ICD-9-CM E883.0.