491.8 CHRONIC BRONCHITIS NEC

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Code Information

Diagnosis Code: 491.8

Short Description: Chronic bronchitis NEC

Long Description: Other chronic bronchitis

Code Classification:

Diseases of the respiratory system (460–519)
- Chronic obstructive pulmonary disease and allied conditions (490-496)
  - 491 Chronic bronchitis
    - 491.8 Chronic bronchitis NEC

Code Version: 2015 ICD-9-CM

Synonyms

Acute exacerbation of chronic bronchitis
Bronchiolitis fibrosa obliterans
Bronchiolitis obliterans with usual interstitial pneumonitis
Chronic mucus hypersecretion
Chronic obliterative bronchiolitis
Chronic tracheitis
Chronic tracheobronchitis
Diffuse panbronchiolitis
Drug-induced bronchiolitis obliterans
Obliterating fibrous bronchiolitis
Obliterative bronchiolitis
Subacute obliterative bronchiolitis
Toxic bronchiolitis obliterans

References to Index of Diseases and Injuries

The code 491.8 has the following ICD-9-CM references to the Index of Diseases and Injuries

Bronchiolitis (acute) (infectious) (subacute) 466.19
- chronic (obliterative) 491.8
- fibrosa obliterans 491.8
- obliterans 491.8
  - with organizing pneumonia (BOOP) 516.8
  - status post lung transplant 996.84
- obliterative (chronic) (diffuse) (subacute) 491.8
  - due to fumes or vapors 506.4

Bronchitis (diffuse) (hypostatic) (infectious) (inflammatory) (simple) 490
- with
  - tracheitis 490
    - chronic 491.8
- capillary 466.19
  - chronic 491.8
- chronic 491.9
  - with
    - tracheitis (chronic) 491.8
  - specified type NEC 491.8
- obliterans 491.8
- ulcerative 491.8
  - Vincent's 101

Infection, infected, infective (opportunistic) 136.9
- trachea, chronic 491.8
  - fungus 117.9

Laryngotracheobronchitis (see also Bronchitis) 490
- chronic 491.8

Tracheitis (acute) (catarrhal) (infantile) (membranous) (plastic) (pneumococcal) (septic) (suppurative) (viral) 464.10
- with
  - bronchitis 490
    - chronic 491.8
- chronic 491.8
  - with
    - bronchitis (chronic) 491.8
    - laryngitis (chronic) 476.1
  - due to external agent - see Condition, respiratory, chronic, due to

Tracheobronchitis (see also Bronchitis) 490
- chronic 491.8
- senile 491.8

Ulcer, ulcerated, ulcerating, ulceration, ulcerative 707.9
- bronchitis 491.8

Crosswalk Information

The code 491.8 converts into the following ICD-10 code(s):

ICD-9 Code		ICD-10 Code	ICD-10 Description
491.8		J41.8	Mixed simple and mucopurulent chronic bronchitis

This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code	ICD-9 Description
491.0	Simple chronic bronchitis
491.1	Mucopurulent chronic bronchitis
491.20	Obstructive chronic bronchitis without exacerbation
491.21	Obstructive chronic bronchitis with (acute) exacerbation
491.22	Obstructive chronic bronchitis with acute bronchitis
491.9	Unspecified chronic bronchitis

This page was last updated on: 10/1/2014

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