ICD-10 code for nose malformation

The ICD-10-CM code for nose malformation is Q30.9 (Congenital malformation of nose, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q30.9.

Within Q30, choose Q30.9 (Congenital malformation of nose, unspecified) only when documentation doesn't support a more specific option: Choanal atresia (Q30.0), agenesis and underdevelopment of nose (Q30.1), Fissured, notched and cleft nose (Q30.2), congenital perforated nasal septum (Q30.3) and other congenital malformations of nose (Q30.8).

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 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.