2025 ICD-10-CM Diagnosis Code I31.8

Other specified diseases of pericardium

• I31.8 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 I31.8 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I31.8 – other international versions of ICD-10 I31.8 may differ.

Applicable To

• Epicardial plaques
• Focal pericardial adhesions

The following code(s) above I31.8 contain annotation back-references

 that may be applicable to I31.8:

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

Approximate Synonyms

• Acquired pericardial cyst

ICD-10-CM I31.8 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 I31.8 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 I31.8:

• Adhesions, adhesive (postinfective) K66.0
  • pericardium (nonrheumatic) I31.0
    • focal I31.8
• Cyst (colloid) (mucous) (simple) (retention)
  • pericardial (congenital) Q24.8
    • acquired I31.8 (secondary)
• Diverticulum, diverticula (multiple) K57.90
  • pericardium (congenital) (cyst) Q24.8
    • acquired I31.8
• Fistula (cutaneous) L98.8
  • pleuropericardial I31.8
• Mediastinopericarditis – see also Pericarditis
  • chronic I31.8
• Pericarditis (with decompensation) (with effusion) I31.9
  • cholesterol (chronic) I31.8
  • neoplastic (chronic) I31.8
• Plaque(s)
  • epicardial I31.8