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ICD-10-CM 2027 diagnosis code

W73.XXXAOther specified cause of accidental non-transport drowning and submersion, initial encounter

✓ Billable / specificPOA exemptRequires 7th character

W73.XXXA is a valid, billable ICD-10-CM code for other specified cause of accidental non-transport drowning and submersion, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth cause of accidental non-transport 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 W73.XXXA

W73.XXXA is the ICD-10-CM diagnosis code for other specified cause of accidental non-transport drowning and submersion, initial encounter. It belongs to category W73 (other specified cause of accidental non-transport 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 E910.8 (other accidental drowning or submersion).

7th character

Ainitial encounter

Other encounter types for W73:

Notes that apply from higher levels

Instructions written at a parent level also apply to W73.XXXA.

› From W73 Other specified cause of accidental non-transport drowning and submersion
Excludes1

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 →
  • E910.8Other accidental drowning or submersionapproximate

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 W73.XXXA

Is W73.XXXA billable?

Yes. W73.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 W73.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 W73.XXXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict W73.XXXA as a principal diagnosis.

Is W73.XXXA a CC or MCC?

No. W73.XXXA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for W73.XXXA?

The CMS General Equivalence Mappings map W73.XXXA to ICD-9-CM E910.8.