Diagnosis Code: 491.20

Short Description: Obst chr bronc w/o exac

Long Description: Obstructive chronic bronchitis without exacerbation

Code Classification:

• Diseases of the respiratory system (460–519)
  • Chronic obstructive pulmonary disease and allied conditions (490-496)
    • 491 Chronic bronchitis
      • 491.20 Obst chr bronc w/o exac

Code Version: 2015 ICD-9-CM

References to Index of Diseases and Injuries

The code 491.20 has the following ICD-9-CM references to the Index of Diseases and Injuries

• Blue
  • bloater 491.20
    • with
      • acute bronchitis 491.22
      • exacerbation (acute) 491.21

• Bronchitis (diffuse) (hypostatic) (infectious) (inflammatory) (simple) 490
  • with
    • obstruction airway, chronic 491.20
      • with
        • acute bronchitis 491.22
        • exacerbation (acute) 491.21
  • chronic 491.9
    • obstructive 491.20
      • with
        • acute bronchitis 491.22
        • exacerbation (acute) 491.21
  • emphysematous 491.20
    • with
      • acute bronchitis 491.22
      • exacerbation (acute) 491.21
  • obstructive (chronic) 491.20
    • with
      • acute bronchitis 491.22
      • exacerbation (acute) 491.21

• Disease, diseased - see also Syndrome
  • lung NEC 518.89
    • obstructive (chronic) (COPD) 496
      • with
        • bronchitis (chronic) 491.20
          • with
            • acute bronchitis 491.22
            • exacerbation (acute) 491.21
  • pulmonary - see also Disease, lung
    • obstructive diffuse (chronic) 496
      • with
        • bronchitis (chronic) 491.20
          • acute 491.22

• Emphysema (atrophic) (centriacinar) (centrilobular) (chronic) (diffuse) (essential) (hypertrophic) (interlobular) (lung) (obstructive) (panlobular) (paracicatricial) (paracinar) (postural) (pulmonary) (senile) (subpleural) (traction) (unilateral) (unilobular) (vesicular) 492.8
  • with bronchitis
    • chronic 491.20

• Obstruction, obstructed, obstructive
  • airway NEC 519.8
    • with
      • bronchitis (see also Bronchitis, with, obstruction) 491.20
    • chronic 496
      • with
        • bronchitis (chronic) (see also Bronchitis, chronic, obstructive) 491.20
  • lung 518.89
    • with
      • bronchitis (chronic) 491.20

• Syndrome - see also Disease
  • blue
    • bloater 491.20

Crosswalk Information

The code 491.20 converts into the following ICD-10 code(s):

Similar Codes

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

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