I31.31 – Malignant pericardial effusion in diseases classified elsewhere

ICD-10-CM 2027 diagnosis code · Other forms of heart disease

Billable code

ICD-10-CM code I31.31

Code: I31.31 (claims format: I3131)
Description: Malignant pericardial effusion in diseases classified elsewhere
Short description: Malignant pericardial effusion in diseases classd elswhr
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I30-I5A Other forms of heart disease
Parent codes: I31 › I31.3

Notes for I31.31

Code first:

underlying neoplasm (C00-D49)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I31 – Other diseases of pericardium

Excludes1 (not coded here):

diseases of pericardium specified as rheumatic (I09.2)
postcardiotomy syndrome (I97.0)
traumatic injury to pericardium (S26.-)

I31.3 – Pericardial effusion (noninflammatory)

Excludes1 (not coded here):

acute pericardial effusion (I30.9)

Index terms for I31.31

Entries in the ICD-10-CM alphabetic index that lead to this code:

Effusion, pericardium, pericardial, malignant, in disease classified elsewhere

Related codes in I31.3

I31.39 – Other pericardial effusion (noninflammatory)Billable

Frequently asked questions

What is ICD-10 code I31.31?

I31.31 is the ICD-10-CM code for malignant pericardial effusion in diseases classified elsewhere, in the block I30-I5A (Other forms of heart disease).

Is I31.31 a billable code?

Yes. I31.31 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I31.31 belong to?

It belongs to category I31 – Other diseases of pericardium.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.