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ICD-10-CM Code R45.4
Irritability and anger

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Mental Health
Mental Health Code
Indicates that the ICD code is referenced in DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Version 5)
| ICD-10 from 2011 - 2016

R45.4 is a billable ICD code used to specify a diagnosis of irritability and anger. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code R454 is used to code Hostility

Hostility is seen as form of emotionally charged angry behavior. In everyday speech it is more commonly used as a synonym for anger and aggression.

MeSH Code: D006791

Two people in a heated argument in New York City.

Source: Wikipedia

MS-DRG Mapping

  • DRG Group #880 - Acute adjustment reaction and psychosocial dysfunction.

ICD-10-CM Alphabetical Index References for 'R45.4 - Irritability and anger'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code R45.4. Click on any term below to browse the alphabetical index.

Irritable, irritability (R45.4)
Anger (R45.4)


Irritability (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code R45.4 and a single ICD9 code, 799.22 is an approximate match for comparison and conversion purposes.

Parent Code: R45 - Symptoms and signs involving emotional state

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/R454