Alphabetic Index FY2027

W73

Other specified cause of accidental non-transport drowning and submersion

FY2027Chapter 20: External causes of morbidity/W65–W74 Accidental non-transport drowning and submersion

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

W73 is a non-billable ICD-10-CM code category for other specified cause of accidental non-transport drowning and submersion. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. A 7th character is required to complete the code. Its coding notes include 3 Excludes1 entries and 1 Excludes2 entry.

7th character

Category W73 requires a 7th character. W73 has only 3 characters, so a placeholder X fills the empty positions.

Assembled code W73.XXXA Open code

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

An external cause code is never a principal or first-listed diagnosis. Its 7th character is assigned for each encounter and should match the injury or condition code.

Guidelines I.C.20.a.2; I.C.20.a.6External cause codesRead the official text

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
Also from chapter/block level (2 notes)
Inherited from W65–W74 Accidental non-transport drowning and submersion
  • accidental drowning and submersion due to fall into water (W16.-)
  • accidental drowning and submersion due to water transport accident (V90.-, V92.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (1 note)
Inherited from W65–W74 Accidental non-transport drowning and submersion
  • accidental drowning and submersion due to cataclysm (X34-X39)

Inclusion terms

Conditions classified to this code.

This code
  • Accidental drowning and submersion while in quenching tank
  • Accidental drowning and submersion while in reservoir

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 20 External causes of morbidity
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

7th-character codes under W73 3