ICD-10-CM Alphabetic Index · FY 2026 50 Entries
Pericarditis in the ICD-10-CM Index ICD-10-CM
The main term Pericarditis (with decompensation) (with effusion) carries 50 index entries pointing to 19 ICD-10-CM codes. The default entry is I31.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
50
Index Entries
19
Codes Referenced
I31.9
Default Code
P
Letter
50 of 50 shown
ICD-10-CM
Index Entries Under Pericarditis 50 entries · 19 codes
Pericarditis (with decompensation) (with effusion) I31.9
with rheumatic fever (conditions in I00)
active see Pericarditis, rheumatic
inactive or quiescent I09.2
acute (hemorrhagic) (nonrheumatic) (Sicca) I30.9
with chorea (acute) (rheumatic) (Sydenham's) I02.0
benign I30.8
nonspecific I30.0
rheumatic I01.0
with chorea (acute) (Sydenham's) I02.0
adhesive or adherent (chronic) (external) (internal) I31.0
acute see Pericarditis, acute
rheumatic I09.2
bacterial (acute) (subacute) (with serous or seropurulent effusion) I30.1
calcareous I31.1
cholesterol (chronic) I31.8
acute I30.9
chronic (nonrheumatic) I31.9
rheumatic I09.2
constrictive (chronic) I31.1
coxsackie B33.23
fibrinocaseous (tuberculous) A18.84
fibrinopurulent I30.1
fibrinous I30.8
fibrous I31.0
gonococcal A54.83
idiopathic I30.0
in systemic lupus erythematosus M32.12
infective I30.1
meningococcal A39.53
neoplastic (chronic) I31.8
acute I30.9
obliterans, obliterating I31.0
plastic I31.0
pneumococcal I30.1
postinfarction I24.1
purulent I30.1
rheumatic (active) (acute) (with effusion) (with pneumonia) I01.0
with chorea (acute) (rheumatic) (Sydenham's) I02.0
chronic or inactive (with chorea) I09.2
rheumatoid see Rheumatoid, carditis
septic I30.1
serofibrinous I30.8
staphylococcal I30.1
streptococcal I30.1
suppurative I30.1
syphilitic A52.06
tuberculous A18.84
uremic N18.9
viral I30.1
The info icon previews the code's description and billable status; the code link opens its full page with all notations.
Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
