ICD-10-CM 2027 diagnosis code

B33.2Viral carditis

Not billable — use a more specific code

B33.2 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About B33.2

B33.2 is the ICD-10-CM diagnosis code for viral carditis. It belongs to category B33 (other viral diseases, not elsewhere classified), block B25-B34 (other viral diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within B33 (other viral diseases, not elsewhere classified), B33.2 is specifically for viral carditis. Related codes cover epidemic myalgia (B33.0), Ross River disease (B33.1), retrovirus infections, not elsewhere classified (B33.3), Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] (B33.4) and other specified viral diseases (B33.8).

To report this condition, pick the subcode that matches the documentation: B33.20 (unspecified), B33.21 (endocarditis), B33.22 (myocarditis), B33.23 (pericarditis) and B33.24 (cardiomyopathy).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under B33.2

Coding notes

Applicable toConditions and synonyms classified to this code

Coxsackie (virus) carditis

Notes that apply from higher levels

Instructions written at a parent level also apply to B33.2.

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Code history

2016
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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about B33.2

Is B33.2 billable?: No. B33.2 is a header code. Report one of its more specific subcodes instead.