ICD-10-CM Alphabetic Index · FY 2026 20 Entries

Empyema in the ICD-10-CM Index ICD-10-CM

The main term Empyema (acute) (chest) (double) (pleura) (supradiaphragmatic) (thorax) carries 20 index entries pointing to 5 ICD-10-CM codes. The default entry is J86.9, 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

Index Entries

Codes Referenced

J86.9

Default Code

Letter

20 of 20 shown

ICD-10-CM

Index Entries Under Empyema 20 entries · 5 codes

Empyema (acute) (chest) (double) (pleura) (supradiaphragmatic) (thorax) J86.9

with fistula J86.0

accessory sinus (chronic) see Sinusitis

antrum (chronic) see Sinusitis, maxillary

brain (any part) see Abscess, brain

ethmoidal (chronic) (sinus) see Sinusitis, ethmoidal

extradural see Abscess, extradural

frontal (chronic) (sinus) see Sinusitis, frontal

gallbladder K81.0

mastoid (process) (acute) see Mastoiditis, acute

maxilla, maxillary M27.2

sinus (chronic) see Sinusitis, maxillary

nasal sinus (chronic) see Sinusitis

sinus (accessory) (chronic) (nasal) see Sinusitis

sphenoidal (sinus) (chronic) see Sinusitis, sphenoidal

subarachnoid see Abscess, extradural

subdural see Abscess, subdural

tuberculous A15.6

ureter see Ureteritis

ventricular see Abscess, brain

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Related Index Terms

All index terms starting with E Index to Diseases and Injuries ICD-10-CM Code Lookup

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.