Specific code 2014 ICD-9-CM Diagnosis Code 422.91
Idiopathic myocarditis
  • Billable Code
  • ICD-9-CM 422.91 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 422.91 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Viral myocarditis
Applies To
  • Myocarditis (acute or subacute):
    • Fiedler's
    • giant cell
    • isolated (diffuse) (granulomatous)
    • nonspecific granulomatous
Convert to ICD-10-CM: 422.91 converts approximately to:
  • 2014 ICD-10-CM I40.0 Infective myocarditis
    Or:
  • 2014 ICD-10-CM I40.1 Isolated myocarditis
ICD-9-CM Volume 2 Index entries containing back-references to 422.91:
  • Abramov-Fiedler myocarditis (acute isolated myocarditis) 422.91
  • Fiedler's
    • myocarditis or syndrome (acute isolated myocarditis) 422.91
  • Myocarditis (fibroid) (interstitial) (old) (progressive) (senile) (with arteriosclerosis) 429.0
    • 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
    • eosinophilic 422.91
    • Fiedler's (acute) (isolated) (subacute) 422.91
    • giant cell (acute) (subacute) 422.91
    • granulomatous (idiopathic) (isolated) (nonspecific) 422.91
    • idiopathic 422.91
      • granulomatous 422.91
    • isolated (diffuse) (granulomatous) 422.91
    • specific (giant cell) (productive) 422.91
    • viral, except Coxsackie 422.91
  • Syndrome - see also Disease
    • Fiedler's (acute isolated myocarditis) 422.91
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 422.91 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 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.