Alphabetic Index FY2027

Y90

Evidence of alcohol involvement determined by blood alcohol level

FY2027Chapter 20: External causes of morbidity/Y90–Y99 Supplementary factors related to causes of morbidity classified elsewhere

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

Y90 is a non-billable ICD-10-CM code category for evidence of alcohol involvement determined by blood alcohol level. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Y90.0 Blood alcohol level of less than 20 mg/100 ml, Y90.1 Blood alcohol level of 20-39 mg/100 ml, Y90.2 Blood alcohol level of 40-59 mg/100 ml, Y90.3 Blood alcohol level of 60-79 mg/100 ml and 6 more. Its coding notes include a Code first instruction.

Guidelines tips

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

Y90 can be assigned when the provider has documented an F10 condition, and the blood alcohol level does not need to be documented by the provider.

Guidelines I.C.5.b.5Blood alcohol level (Y90)Read the official text

Code first

If the underlying condition listed here is present and known, sequence it first.

This code
  • any associated alcohol related disorders (F10)

Notes

Also from chapter/block level (2 notes)
Inherited from Y90–Y99 Supplementary factors related to causes of morbidity classified elsewhere
  • These categories may be used to provide supplementary information concerning causes of morbidity. They are not to be used for single-condition coding.
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.

More specific codes under Y90 10