Home > 2013 ICD-9-CM Diagnosis Codes > Diseases Of The Respiratory System 460-519 > Chronic Obstructive Pulmonary Disease And Allied Conditions 490-496 > Chronic bronchitis 491-
2013 ICD-9-CM Diagnosis Code 491.8
Other chronic bronchitis
- ICD-9-CM 491.8 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
491.8 Alternative Terminology
- 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
Applies To
- Chronic:
- tracheitis
- tracheobronchitis
Convert 491.8 to ICD-10-CM 
ICD-9-CM 491.8 converts approximately to:
- 2013 ICD-10-CM J41.8 Mixed simple and mucopurulent chronic bronchitis
ICD-9-CM Volume 2 Index entries containing back-references to 491.8:
- Bronchiolitis (acute) (infectious) (subacute) 466.19
chronic (obliterative) 491.8
- fibrosa obliterans 491.8
obliterative (chronic) (diffuse) (subacute) 491.8
due to fumes or vapors 506.4
- Bronchitis (diffuse) (hypostatic) (infectious) (inflammatory) (simple) 490
- with
- chronic 491.9
- 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
- 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
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 491.8 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2013 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.
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