ICD10
ICD-10 Code I31.3: Pericardial effusion (noninflammatory)
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
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 Diseases of the circulatory system (I00-I99).
When is it used?
- May be used when a clinician documents pericardial effusion (noninflammatory) 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
9Diseases of the circulatory system (I00-I99)
block
I30-I5AOther forms of heart disease
category
I31Other diseases of pericardium
currentI31
Official coding notes
Excludes1 (do not code together)
- acute pericardial effusion (I30.9)
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
CardiologistGeneral Physician
Related codes
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 233890005high
Chylopericardium
Source: SNOMED International ICD-10 map
SNOMED_CT 450303000high
Congenital pericardial effusion
Source: SNOMED International ICD-10 map
SNOMED_CT 1269348003high
Malignant pericardial effusion
Source: SNOMED International ICD-10 map
SNOMED_CT 373945007high
Pericardial effusion
Source: SNOMED International ICD-10 map
SNOMED_CT 194970009high
Pericardial effusion - noninflammatory
Source: SNOMED International ICD-10 map
SNOMED_CT 1172567004high
Postoperative chylopericardium
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
I31.3
Replacement codes
I31.31 — Malignant pericardial effusion in diseases classified elsewhereI31.39 — Other pericardial effusion (noninflammatory)
Common synonyms
Pericardial effusion (noninflammatory)Pericardial effusionPericardial effusion noninflammatory
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.