2025 ICD-10-CM Diagnosis Code I31.1

Chronic constrictive pericarditis

• I31.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2025 edition of ICD-10-CM I31.1 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I31.1 – other international versions of ICD-10 I31.1 may differ.

Applicable To

• Concretio cordis
• Pericardial calcification

The following code(s) above I31.1 contain annotation back-references

 that may be applicable to I31.1:

• I00-I99  Diseases of the circulatory system
• I31  Other diseases of pericardium

Approximate Synonyms

• Calcification of pericardium
• Constrictive pericarditis

ICD-10-CM I31.1 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

• 314 Other circulatory system diagnoses with mcc
• 315 Other circulatory system diagnoses with cc
• 316 Other circulatory system diagnoses without cc/mcc

Convert I31.1 to ICD-9-CMCode History

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change
• 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to I31.1:

• Calcification
  • pericardium I31.1 – see also Pericarditis
• Concato’s disease (pericardial polyserositis) A19.9
  • nontubercular I31.1
• Concretio cordis I31.1
• Disease, diseased – see also Syndrome
  • Concato’s (pericardial polyserositis) A19.9
    • nontubercular I31.1
  • Pick’sG31.01 – see also Dementia, in, diseases specified elsewhere
    • of pericardium I31.1 (pericardial pseudocirrhosis of liver)
• Gouley’s syndrome I31.1 (constrictive pericarditis)
• Pericarditis (with decompensation) (with effusion) I31.9
  • calcareous I31.1
  • constrictive I31.1 (chronic)
• Pick’s
  • disease or syndrome (brain) G31.01 – see also Dementia, in, diseases specified elsewhere
    • pericardium I31.1 (pericardial pseudocirrhosis of liver)
  • syndrome
    • of heart I31.1 (pericardial pseudocirrhosis of liver)
• Polyserositis
  • due to pericarditis I31.1
  • pericardial I31.1
• Pseudocirrhosis, liver, pericardial I31.1
• Serositis, multipleK65.8
  • pericardial I31.1
• Syndrome – see also Disease
  • Gouley’s I31.1