2024 ICD-10-CM Diagnosis Code B33.21

by

Viral endocarditis

  • B33.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM B33.21 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of B33.21 – other international versions of ICD-10 B33.21 may differ.

The following code(s) above B33.21 contain annotation back-references

 that may be applicable to B33.21:

  • A00-B99  Certain infectious and parasitic diseases
  • B33.2  Viral carditis

Approximate Synonyms

  • Viral myocarditis

ICD-10-CM B33.21 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 306 Cardiac congenital and valvular disorders with mcc
  • 307 Cardiac congenital and valvular disorders without mcc

Convert B33.21 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to B33.21:

  • Coxsackie (virus) (infection) B34.1
    • endocarditis B33.21
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
    • Coxsackie B33.21