Specific code 2007 ICD-9-CM Diagnosis Code 420.99
Other acute pericarditis
  • Short description: ACUTE PERICARDITIS NEC.
  • ICD-9-CM 420.99 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 420.99 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2007 version of ICD-9-CM 420.99.
  • More recent version(s) of ICD-9-CM 420.99: 2008 2009 2010 2011 2012 2013 2014.
420.99 Excludes
  • pericarditis in diseases classified elsewhere (420.0)
Applies To
  • Pericarditis (acute):
    • pneumococcal
    • purulent
    • staphylococcal
    • streptococcal
    • suppurative
  • Pneumopyopericardium
  • Pyopericardium
Convert to ICD-10-CM: 420.99 converts approximately to:
  • 2014 ICD-10-CM I30.8 Other forms of acute pericarditis
ICD-9-CM Volume 2 Index entries containing back-references to 420.99:
  • Abscess (acute) (chronic) (infectional) (lymphangitic) (metastatic) (multiple) (pyogenic) (septic) (with lymphangitis) (see also Cellulitis) 682.9
    • pericardial 420.99
  • Pericarditis (granular) (with decompensation) (with effusion) 423.9
    • bacterial (acute) (subacute) (with serous or seropurulent effusion) 420.99
    • fibrinopurulent 420.99
    • fibropurulent 420.99
    • pneumococcal (acute) 420.99
    • purulent (acute) 420.99
    • septic (acute) 420.99
    • staphylococcal (acute) 420.99
    • streptococcal (acute) 420.99
    • suppurative (acute) 420.99
  • Pneumopyopericardium 420.99
  • Pyopericarditis 420.99
  • Pyopericardium 420.99
  • Pyopneumopericardium 420.99
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 420.99 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 2007 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.