ICD-9-CM Codes ICD-9-PCS Codes

491.21 - Obstructive chronic bronchitis with (acute) exacerbation

GEM Conversion to ICD-10 CM

J44.1

Fs: 10000 – Chronic obstructive pulmonary disease with (acute) exacerbation

Sibling Codes

491.20

Obstructive chronic bronchitis without exacerbation

491.21

Obstructive chronic bronchitis with (acute) exacerbation

491.22

Obstructive chronic bronchitis with acute bronchitis

Parent Sibling Codes

491.0

Simple chronic bronchitis

491.1

Mucopurulent chronic bronchitis

491.8

Other chronic bronchitis

491.9

Unspecified chronic bronchitis