ICD10BillableValid for clinical use
ICD-10 Code I31.9: Disease of pericardium, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 disease of pericardium, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
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.
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
Inclusion terms
- Pericarditis (chronic) NOS
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
CardiologistGeneral Physician
Related codes
Sibling codes
Coverage-related procedures and services
CPT 93319high
3D ECHOCARDIOGRAPHIC IMAGING AND POSTPROCESSING DURING TRANSESOPHAGEAL ECHOCARDIOGRAPHY, OR DURING TRANSTHORACIC ECHOCARDIOGRAPHY FOR CONGENITAL CARDIAC ANOMALIES, FOR THE ASSESSMENT OF CARDIAC STRUCTURE(S) (EG, CARDIAC CHAMBERS AND VALVES, LEFT ATRIAL APPENDAGE, INTERATRIAL SEPTUM, INTERVENTRICULAR SEPTUM) AND FUNCTION, WHEN PERFORMED (LIST SEPARATELY IN ADDITION TO CODE FOR ECHOCARDIOGRAPHIC IMAGING)
Source: CMS coverage guidance
CPT 75716high
ANGIOGRAPHY, EXTREMITY, BILATERAL, RADIOLOGICAL SUPERVISION AND INTERPRETATION
Source: CMS coverage guidance
CPT 75710high
ANGIOGRAPHY, EXTREMITY, UNILATERAL, RADIOLOGICAL SUPERVISION AND INTERPRETATION
Source: CMS coverage guidance
CPT 75705high
ANGIOGRAPHY, SPINAL, SELECTIVE, RADIOLOGICAL SUPERVISION AND INTERPRETATION
Source: CMS coverage guidance
CPT 75630high
AORTOGRAPHY, ABDOMINAL PLUS BILATERAL ILIOFEMORAL LOWER EXTREMITY, CATHETER, BY SERIALOGRAPHY, RADIOLOGICAL SUPERVISION AND INTERPRETATION
Source: CMS coverage guidance
CPT 75625high
AORTOGRAPHY, ABDOMINAL, BY SERIALOGRAPHY, RADIOLOGICAL SUPERVISION AND INTERPRETATION
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 35304003high
Cardiac tamponade
Source: SNOMED International ICD-10 map
SNOMED_CT 34791000119103high
Chest pain due to pericarditis
Source: SNOMED International ICD-10 map
SNOMED_CT 27017003high
Chronic effusive pericarditis
Source: SNOMED International ICD-10 map
SNOMED_CT 23627006high
Chronic pericarditis
Source: SNOMED International ICD-10 map
SNOMED_CT 55855009high
Disorder of pericardium
Source: SNOMED International ICD-10 map
SNOMED_CT 23842007high
Drug-induced pericarditis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
I31.9
Common synonyms
Disease of pericardium, unspecifiedDisease of pericardium
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.