Specific code 2006 ICD-9-CM Diagnosis Code 422.90
Acute myocarditis unspecified
  • Short description: ACUTE MYOCARDITIS NOS.
  • ICD-9-CM 422.90 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 422.90 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
  • You are viewing the 2006 version of ICD-9-CM 422.90.
  • More recent version(s) of ICD-9-CM 422.90: 2007 2008 2009 2010 2011 2012 2013 2014 2015.
Convert to ICD-10-CM: 422.90 converts directly to:
  • 2015/16 ICD-10-CM I40.9 Acute myocarditis, unspecified
Applies To
  • Acute or subacute (interstitial) myocarditis
ICD-9-CM Volume 2 Index entries containing back-references to 422.90:
  • Infection, infected, infective (opportunistic) 136.9
    • myocardium NEC 422.90
  • Myocarditis (fibroid) (interstitial) (old) (progressive) (senile) (with arteriosclerosis) 429.0
    • active (nonrheumatic) 422.90
      • rheumatic 391.2
        • with chorea (acute) (rheumatic) (Sydenham's) 392.0
    • acute or subacute (interstitial) 422.90
      • due to Streptococcus (beta-hemolytic) 391.2
      • idiopathic 422.91
      • rheumatic 391.2
        • with chorea (acute) (rheumatic) (Sydenham's) 392.0
      • specified type NEC 422.99
    • nonrheumatic, active 422.90
    • parenchymatous 422.90
  • Rupture, ruptured 553.9
    • heart (auricle) (ventricle) (see also Infarct, myocardium) 410.9
      • infectional 422.90
      • traumatic - see Rupture, myocardium, traumatic
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 422.90 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2006 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.