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ICD10BillableValid for clinical use

ICD-10 Code I31.1: Chronic constrictive pericarditis

I31.1 is a billable ICD-10 diagnosis code used to classify Chronic constrictive pericarditis in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. 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).

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 chronic constrictive pericarditis 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
  • Concretio cordis
  • Pericardial calcification

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

Coverage-related procedures and services

CPT 93325high
DOPPLER ECHOCARDIOGRAPHY COLOR FLOW VELOCITY MAPPING (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHY)
Source: CMS coverage guidance
CPT 93320high
DOPPLER ECHOCARDIOGRAPHY, PULSED WAVE AND/OR CONTINUOUS WAVE WITH SPECTRAL DISPLAY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING); COMPLETE
Source: CMS coverage guidance
CPT 93321high
DOPPLER ECHOCARDIOGRAPHY, PULSED WAVE AND/OR CONTINUOUS WAVE WITH SPECTRAL DISPLAY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING); FOLLOW-UP OR LIMITED STUDY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING)
Source: CMS coverage guidance
CPT 75574high
COMPUTED TOMOGRAPHIC ANGIOGRAPHY, HEART, CORONARY ARTERIES AND BYPASS GRAFTS (WHEN PRESENT), WITH CONTRAST MATERIAL, INCLUDING 3D IMAGE POSTPROCESSING (INCLUDING EVALUATION OF CARDIAC STRUCTURE AND MORPHOLOGY, ASSESSMENT OF CARDIAC FUNCTION, AND EVALUATION OF VENOUS STRUCTURES, IF PERFORMED)
Source: CMS coverage guidance
CPT 75572high
COMPUTED TOMOGRAPHY, HEART, WITH CONTRAST MATERIAL, FOR EVALUATION OF CARDIAC STRUCTURE AND MORPHOLOGY (INCLUDING 3D IMAGE POSTPROCESSING, ASSESSMENT OF CARDIAC FUNCTION, AND EVALUATION OF VENOUS STRUCTURES, IF PERFORMED)
Source: CMS coverage guidance
CPT 75573high
COMPUTED TOMOGRAPHY, HEART, WITH CONTRAST MATERIAL, FOR EVALUATION OF CARDIAC STRUCTURE AND MORPHOLOGY IN THE SETTING OF CONGENITAL HEART DISEASE (INCLUDING 3D IMAGE POSTPROCESSING, ASSESSMENT OF LEFT VENTRICULAR [LV] CARDIAC FUNCTION, RIGHT VENTRICULAR [RV] STRUCTURE AND FUNCTION AND EVALUATION OF VASCULAR STRUCTURES, IF PERFORMED)
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
I31.1

Common synonyms

Chronic constrictive pericarditis

Frequently asked questions

Code details

CodeI31.1
SystemICD10
Display nameChronic constrictive pericarditis
ChapterDiseases of the circulatory system (I00-I99)
BlockOther forms of heart disease

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
CalcificationConcato's disease(pericardial polyserositis)Concretio cordisDisease, diseasedDisease, diseasedGouley's syndrome(constrictive pericarditis)Pericarditis(with decompensation) (with effusion)Pericarditis(with decompensation) (with effusion)Pick'sPick'sPolyserositisPolyserositis
See also
Pericarditis

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.

ICD-10 Code I31.1 for Chronic constrictive pericarditis | HealthAssure