What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).
When is it used?
- May be used when a clinician documents viral carditis in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
1Certain infectious and parasitic diseases (A00-B99)
block
B25-B34Other viral diseases
category
B33Other viral diseases, not elsewhere classified
currentB33
Official coding notes
Inclusion terms
- Coxsackie (virus) carditis
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
Infectious Disease SpecialistGeneral Physician
Related codes
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 194944008high
Acute myocarditis - coxsackie
Source: SNOMED International ICD-10 map
SNOMED_CT 194946005high
Acute myocarditis - influenzal
Source: SNOMED International ICD-10 map
SNOMED_CT 194905000high
Acute pericarditis caused by human coxsackievirus
Source: SNOMED International ICD-10 map
SNOMED_CT 788860005high
Acute viral carditis
Source: SNOMED International ICD-10 map
SNOMED_CT 65718001high
Adenoviral myocarditis
Source: SNOMED International ICD-10 map
SNOMED_CT 204981000119101high
Cardiomyopathy due to viral infection
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
B33.2
Replacement codes
B33.20 — Viral carditis, unspecifiedB33.21 — Viral endocarditisB33.22 — Viral myocarditisB33.23 — Viral pericarditisB33.24 — Viral cardiomyopathy
Common synonyms
Viral carditis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.