Convert to ICD-10-CM:
491.20 converts approximately to:
- 2015/16 ICD-10-CM J44.9 Chronic obstructive pulmonary disease, unspecified
ICD-9-CM Volume 2 Index entries containing back-references to
491.20:
- Blue
- Bronchitis (diffuse) (hypostatic) (infectious) (inflammatory) (simple) 490
![](/images/note.png)
with![](/images/vertical.gif)
emphysema - see Emphysema![](/images/vertical.gif)
influenza, flue, or grippe (see also Influenza) 487.1![](/images/note.png)
![](/images/vertical.gif)
obstruction airway, chronic 491.20![](/images/vertical.gif)
tracheitis 490![](/images/note.png)
obstructive (chronic) 491.20![](/images/16x16.gif)
with
- Disease, diseased - see also Syndrome
lung NEC 518.89![](/images/note.png)
![](/images/vertical.gif)
black 500![](/images/note.png)
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congenital 748.60![](/images/note.png)
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cystic 518.89![](/images/note.png)
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fibroid (chronic) (see also Fibrosis, lung) 515![](/images/note.png)
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fluke 121.2![](/images/note.png)
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in![](/images/vertical.gif)
interstitial (chronic) 515![](/images/note.png)
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nonspecific, chronic 496![](/images/note.png)
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obstructive (chronic) (COPD) 496![](/images/note.png)
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with![](/images/vertical.gif)
![](/images/vertical.gif)
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acute![](/images/vertical.gif)
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alveolitis, allergic (see also Alveolitis, allergic) 495.9![](/images/note.png)
![](/images/vertical.gif)
![](/images/vertical.gif)
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asthma (chronic) (obstructive) 493.2![](/images/note.png)
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![](/images/vertical.gif)
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bronchiectasis 494.0![](/images/note.png)
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with acute exacerbation 494.1![](/images/note.png)
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bronchitis (chronic) 491.20![](/images/vertical.gif)
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decompensated 491.21![](/images/note.png)
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emphysema NEC 492.8![](/images/note.png)
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diffuse (with fibrosis) 496![](/images/note.png)
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of childhood, specified NEC 516.69![](/images/note.png)
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polycystic 518.89![](/images/note.png)
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asthma (chronic) (obstructive) 493.2![](/images/note.png)
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congenital 748.4![](/images/note.png)
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purulent (cavitary) 513.0![](/images/note.png)
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restrictive 518.89![](/images/note.png)
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rheumatoid 714.81![](/images/note.png)
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specified NEC 518.89![](/images/note.png)
pulmonary - see also Disease, lung![](/images/16x16.gif)
amyloid 277.39
[517.8
]![](/images/16x16.gif)
artery 417.9![](/images/note.png)
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circulation, circulatory 417.9![](/images/note.png)
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diffuse obstructive (chronic) 496![](/images/note.png)
![](/images/16x16.gif)
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with![](/images/16x16.gif)
![](/images/vertical.gif)
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acute bronchitis 491.22![](/images/note.png)
![](/images/16x16.gif)
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asthma (chronic) (obstructive) 493.2![](/images/note.png)
![](/images/16x16.gif)
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exacerbation NEC (acute) 491.21![](/images/note.png)
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heart (chronic) 416.9![](/images/note.png)
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hypertensive (vascular) 416.0![](/images/note.png)
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obstructive diffuse (chronic) 496![](/images/note.png)
![](/images/16x16.gif)
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with![](/images/16x16.gif)
![](/images/vertical.gif)
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acute bronchitis 491.22![](/images/note.png)
![](/images/16x16.gif)
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asthma (chronic) (obstructive) 493.2![](/images/note.png)
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bronchitis (chronic) 491.20![](/images/16x16.gif)
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exacerbation NEC (acute) 491.21![](/images/note.png)
![](/images/16x16.gif)
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decompensated 491.21![](/images/note.png)
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valve (see also Endocarditis, pulmonary) 424.3![](/images/note.png)
- Emphysema (atrophic) (centriacinar) (centrilobular) (chronic) (diffuse) (essential) (hypertrophic) (interlobular) (lung) (obstructive) (panlobular) (paracicatricial) (paracinar) (postural) (pulmonary) (senile) (subpleural) (traction) (unilateral) (unilobular) (vesicular) 492.8
![](/images/note.png)
with bronchitis![](/images/16x16.gif)
chronic 491.20
- Obstruction, obstructed, obstructive
airway NEC 519.8![](/images/note.png)
![](/images/vertical.gif)
with![](/images/vertical.gif)
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allergic alveolitis NEC 495.9![](/images/note.png)
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asthma NEC (see also Asthma) 493.9![](/images/note.png)
![](/images/vertical.gif)
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bronchiectasis 494.0![](/images/note.png)
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![](/images/vertical.gif)
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with acute exacerbation 494.1![](/images/note.png)
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bronchitis (see also Bronchitis, with, obstruction) 491.20![](/images/vertical.gif)
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emphysema NEC 492.8![](/images/note.png)
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chronic 496![](/images/note.png)
![](/images/vertical.gif)
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with![](/images/vertical.gif)
![](/images/vertical.gif)
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allergic alveolitis NEC 495.5![](/images/note.png)
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asthma NEC (see also Asthma) 493.2![](/images/note.png)
![](/images/vertical.gif)
![](/images/vertical.gif)
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bronchiectasis 494.0![](/images/note.png)
![](/images/vertical.gif)
![](/images/vertical.gif)
![](/images/16x16.gif)
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with acute exacerbation 494.1![](/images/note.png)
![](/images/vertical.gif)
![](/images/vertical.gif)
![](/images/16x16.gif)
bronchitis (chronic) (see also Bronchitis, chronic, obstructive) 491.20![](/images/vertical.gif)
![](/images/vertical.gif)
![](/images/16x16.gif)
emphysema NEC 492.8![](/images/note.png)
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due to
lung 518.89![](/images/note.png)
![](/images/16x16.gif)
with![](/images/16x16.gif)
![](/images/vertical.gif)
asthma - see Asthma![](/images/16x16.gif)
![](/images/vertical.gif)
bronchitis (chronic) 491.20![](/images/16x16.gif)
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emphysema NEC 492.8![](/images/note.png)
![](/images/16x16.gif)
airway, chronic 496![](/images/note.png)
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chronic NEC 496![](/images/note.png)
![](/images/16x16.gif)
![](/images/vertical.gif)
with![](/images/16x16.gif)
![](/images/vertical.gif)
![](/images/16x16.gif)
asthma (chronic) (obstructive) 493.2![](/images/note.png)
![](/images/16x16.gif)
disease, chronic 496![](/images/note.png)
![](/images/16x16.gif)
![](/images/vertical.gif)
with![](/images/16x16.gif)
![](/images/vertical.gif)
![](/images/16x16.gif)
asthma (chronic) (obstructive) 493.2![](/images/note.png)
![](/images/16x16.gif)
emphysematous 492.8![](/images/note.png)
- Syndrome - see also Disease
blue