ICD-10 code for lung lobe accessory

The ICD-10-CM code for lung lobe accessory is Q33.1 (Accessory lobe of lung).

Within Q33 (congenital malformations of lung), Q33.1 is specifically for accessory lobe of lung. Related codes cover congenital cystic lung (Q33.0), sequestration of lung (Q33.2), agenesis of lung (Q33.3), congenital bronchiectasis (Q33.4), ectopic tissue in lung (Q33.5), congenital hypoplasia and dysplasia of lung (Q33.6), other congenital malformations of lung (Q33.8) and congenital malformation of lung, unspecified (Q33.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 205 (Other Respiratory System Diagnoses with MCC, relative weight 1.8244) and DRG 206 (Other Respiratory System Diagnoses without MCC, relative weight 0.9257), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.