Specific code 2013 ICD-9-CM Diagnosis Code 421.1
Acute and subacute infective endocarditis in diseases classified elsewhere
  • Short description: Ac endocardit in oth dis.
  • ICD-9-CM 421.1 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 421.1 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 2013 version of ICD-9-CM 421.1.
  • More recent version(s) of ICD-9-CM 421.1: 2014 2015.
Convert to ICD-10-CM: 421.1 converts approximately to:
  • 2015/16 ICD-10-CM I39 Endocarditis and heart valve disorders in diseases classified elsewhere
421.1 Excludes
Code First
  • Code first underlying disease, as:
ICD-9-CM Volume 2 Index entries containing back-references to 421.1:
  • Endocarditis (chronic) (indeterminate) (interstitial) (marantic) (nonbacterial thrombotic) (residual) (sclerotic) (sclerous) (senile) (valvular) 424.90
    • blastomycotic 116.0 [421.1]
  • Typhoid (abortive) (ambulant) (any site) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) 002.0
    • endocarditis 002.0 [421.1]
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 421.1 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 2013 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.