I30.9 — Acute pericarditis, unspecified
I30.9 is a billable, specific ICD-10-CM code for acute pericarditis, unspecified. It is valid for submission on a claim.
Other codes that can never be billed with I30.9
These codes carry an Excludes1 note pointing at I30.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I30.9 alone.
- I31.3Pericardial effusion (noninflammatory)
Risk adjustment
I30.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I30.9 is named in 18 Medicare coverage policies — 18 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A55354Billing and Coding: Frequency of Hemodialysis
- A55672Billing and Coding: Frequency of Hemodialysis
- A55675Billing and Coding: Frequency of Hemodialysis
How I30.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I30.9.
- Chylopericardium›acute
- Mediastinopericarditis›acute
- Pericarditis›acute(hemorrhagic) (nonrheumatic) (Sicca)
- Pleuropericarditis›acute
- Pneumopericarditis›acute
- Pericarditis›cholesterol›acute
- Pericarditis›neoplastic›acute
Related codes at this level
Codes that share I30. If I30.9 is not quite right, the correct code is usually one of these.
Questions about I30.9
- Is I30.9 a billable ICD-10-CM code?
- Yes. I30.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I30.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).