2021 ICD-10-CM Diagnosis Code B33.23

Viral pericarditis

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • B33.23 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM B33.23 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of B33.23 - other international versions of ICD-10 B33.23 may differ.
The following code(s) above B33.23 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to B33.23:
  • A00-B99
    2021 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • B33.2
    ICD-10-CM Diagnosis Code B33.2

    Viral carditis

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Coxsackie (virus) carditis
    Viral carditis
ICD-10-CM B33.23 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 314 Other circulatory system diagnoses with mcc
  • 315 Other circulatory system diagnoses with cc
  • 316 Other circulatory system diagnoses without cc/mcc

Convert B33.23 to ICD-9-CM

Code 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
Code annotations containing back-references to B33.23:
  • Code Also: M35.81
    ICD-10-CM Diagnosis Code M35.81

    Multisystem inflammatory syndrome

      2021 - New Code Billable/Specific Code
    Applicable To
    • MIS-A
    • MIS-C
    • Multisystem inflammatory syndrome in adults
    • Multisystem inflammatory syndrome in children
    • Pediatric inflammatory multisystem syndrome
    • PIMS
    Code First
    • , if applicable, COVID-19 (U07.1)
    Code Also
    • any associated complications such as:
    • acute hepatic failure (K72.0-)
    • acute kidney failure (N17.-)
    • acute myocarditis (I40.-)
    • acute respiratory distress syndrome (J80)
    • cardiac arrhythmia (I47-I49.-)
    • pneumonia due to COVID-19 (J12.82)
    • severe sepsis (R65.2-)
    • viral cardiomyopathy (B33.24)
    • viral pericarditis (B33.23)
    Use Additional
    • code, if applicable, for:
    • exposure to COVID-19 or SARS-CoV-2 infection (Z20.822)
    • personal history of COVID-19 (Z86.16)
    • sequelae of COVID-19 (B94.8)
  • Type 1 Excludes: I32
    , I30
    ICD-10-CM Diagnosis Code I32

    Pericarditis in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease
    Type 1 Excludes
    ICD-10-CM Diagnosis Code I30

    Acute pericarditis

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    • acute mediastinopericarditis
    • acute myopericarditis
    • acute pericardial effusion
    • acute pleuropericarditis
    • acute pneumopericarditis
    Type 1 Excludes
    • Dressler's syndrome (I24.1)
    • rheumatic pericarditis (acute) (I01.0)
    • viral pericarditis due to Coxsakie virus (B33.23)

Diagnosis Index entries containing back-references to B33.23:
  • Coxsackie (virus) (infection) B34.1
    ICD-10-CM Diagnosis Code B34.1

    Enterovirus infection, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Coxsackievirus infection NOS
    • Echovirus infection NOS
    • pericarditis B33.23
  • Pericarditis (with decompensation) (with effusion) I31.9
    ICD-10-CM Diagnosis Code I31.9

    Disease of pericardium, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Pericarditis (chronic) NOS
    • coxsackie B33.23

ICD-10-CM Codes Adjacent To B33.23
B30.3 Acute epidemic hemorrhagic conjunctivitis (enteroviral)
B30.8 Other viral conjunctivitis
B30.9 Viral conjunctivitis, unspecified
B33 Other viral diseases, not elsewhere classified
B33.0 Epidemic myalgia
B33.1 Ross River disease
B33.2 Viral carditis
B33.20 …… unspecified
B33.21 Viral endocarditis
B33.22 Viral myocarditis
B33.23 Viral pericarditis
B33.24 Viral cardiomyopathy
B33.3 Retrovirus infections, not elsewhere classified
B33.4 Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]
B33.8 Other specified viral diseases
B34 Viral infection of unspecified site
B34.0 Adenovirus infection, unspecified
B34.1 Enterovirus infection, unspecified
B34.2 Coronavirus infection, unspecified
B34.3 Parvovirus infection, unspecified
B34.4 Papovavirus infection, unspecified

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