ICD-10-CM Alphabetic Index · FY 2026 22 Entries
Bronchiolitis in the ICD-10-CM Index ICD-10-CM
The main term Bronchiolitis (acute) (infective) (subacute) carries 22 index entries pointing to 10 ICD-10-CM codes. The default entry is J21.9, 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
22
Index Entries
10
Codes Referenced
J21.9
Default Code
B
Letter
22 of 22 shown
ICD-10-CM
Index Entries Under Bronchiolitis 22 entries · 10 codes
Bronchiolitis (acute) (infective) (subacute) J21.9
with
bronchospasm or obstruction J21.9
influenza, flu or grippe see Influenza, with, respiratory manifestations NEC
chemical (chronic) J68.4
acute J68.0
chronic (fibrosing) J44.89
obliterative J44.81
due to
external agent see Bronchitis, acute, due to
human metapneumovirus J21.1
respiratory syncytial virus (RSV) J21.0
specified organism NEC J21.8
fibrosa obliterans J44.81
influenzal see Influenza, with, respiratory manifestations NEC
obliterans J44.81 see also Bronchiolitis, obliterative
with organizing pneumonia (BOOP) J84.89
syndrome J44.81
obliterative (chronic) (subacute) J44.81 see also Bronchiolitis, obliterans
due to chemicals, gases, fumes or vapors (inhalation) J44.81 see also Disease, respiratory, chronic, due to chemicals, gases, fumes or vapors
due to fumes or vapors J44.81 see also Disease, respiratory, chronic, due to chemicals, gases, fumes or vapors
respiratory, interstitial lung disease J84.115
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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.
