1. ICD-10-CM Codes
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2. A00-B99 Certain infectious and parasitic diseases
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3. B25-B34 Other viral diseases
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4. B33- Other viral diseases, not elsewhere classified
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5. 2020 ICD-10-CM Diagnosis Code B33.21

2020 ICD-10-CM Diagnosis Code B33.21

Viral endocarditis

2016 2017 2018 2019 2020 Billable/Specific Code

• B33.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2020 edition of ICD-10-CM B33.21 became effective on October 1, 2019.
• This is the American ICD-10-CM version of B33.21 - other international versions of ICD-10 B33.21 may differ.

• Viral myocarditis

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

Convert B33.21 to ICD-9-CM

• 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

• Coxsackie (virus) (infection) B34.1
  ICD-10-CM Diagnosis Code B34.1

  Enterovirus infection, unspecified

  2016 2017 2018 2019 2020 Billable/Specific Code

  Applicable To

  • Coxsackievirus infection NOS
  • Echovirus infection NOS
  • endocarditis B33.21
• Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
  ICD-10-CM Diagnosis Code I38

  Endocarditis, valve unspecified

  2016 2017 2018 2019 2020 Billable/Specific Code

  Includes

  • endocarditis (chronic) NOS
  • valvular incompetence NOS
  • valvular insufficiency NOS
  • valvular regurgitation NOS
  • valvular stenosis NOS
  • valvulitis (chronic) NOS

  Type 1 Excludes

  • congenital insufficiency of cardiac valve NOS (Q24.8)
  • congenital stenosis of cardiac valve NOS (Q24.8)
  • endocardial fibroelastosis (I42.4)
  • endocarditis specified as rheumatic (I09.1)
  • Coxsackie B33.21

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.