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ICD-10-CM code · FY2027

I31.31 Malignant pericardial effusion in diseases classified elsewhere

BillableValid for claims as a specific diagnosis code

About I31.31

Code
I31.31
Billable
Yes
Short description
Malignant pericardial effusion in diseases classd elswhr
Category
I31 Other diseases of pericardium
Block
I30-I5A Other forms of heart disease
Chapter
9 Diseases of the circulatory system
Code set
FY2027, October 1, 2026 to September 30, 2027
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Coding notes for I31.31

Code first Report the underlying condition's code before this one.

Also applies, from I31.3 Pericardial effusion (noninflammatory)

Excludes1 Not coded here: never report these together with this code (use the code given instead).

  • acute pericardial effusion (I30.9)

Also applies, from I31 Other diseases of pericardium

Excludes1 Not coded here: never report these together with this code (use the code given instead).

  • diseases of pericardium specified as rheumatic (I09.2)
  • postcardiotomy syndrome (I97.0)
  • traumatic injury to pericardium (S26.-)
Chapter 9 notes (apply to every code in it)

Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Related codes in I31.3

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ICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.

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