I31Header code — not billable
Other diseases of pericardium
- Chapter
- 9. Diseases of the circulatory system
- Category
- I31
- Effective date
- October 1, 2026
Related codes in category I31
I31.0Chronic adhesive pericarditisYesI31.1Chronic constrictive pericarditisYesI31.2Hemopericardium, not elsewhere classifiedYesI31.3Pericardial effusion (noninflammatory)I31.31Malignant pericardial effusion in diseases classd elswhrYesI31.39Other pericardial effusion (noninflammatory)YesI31.4Cardiac tamponadeYesI31.8Other specified diseases of pericardiumYesI31.9Disease of pericardium, unspecifiedYes
Frequently asked questions
What is ICD-10 code I31?
I31 is an ICD-10-CM diagnosis code for Other diseases of pericardium.
Is I31 a billable code?
No. I31 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is I31 in?
I31 falls under Chapter 9: Diseases of the circulatory system.
When did I31 become effective?
I31 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to I31?
I31 belongs to category I31, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.