I31.9

I31.9: Disease of pericardium, unspecified

Billable / specific codeICD-10-CM

I31.9 is a billable, specific ICD-10-CM code for disease of pericardium, unspecified. It is valid for submission on a claim.

Check I31.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Pericarditis (chronic) NOS

Excludes1 inherited from the categories above I31.9

A category’s note binds every code beneath it.

Written on I31: Other diseases of pericardium

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

Other codes that can never be billed with I31.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

I09.2Chronic rheumatic pericarditis

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I31.9 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
A56625Billing and Coding: Echocardiography

Alphabetic index entries that lead here

Pericarditis(with decompensation) (with effusion)
Pericarditis›chronic(nonrheumatic)

Code history

Unchanged in every release from FY2024 to FY2027.