ICD-10 code for congenital leukonychia

The ICD-10-CM code for congenital leukonychia is Q84.4 (Congenital leukonychia).

Within Q84 (other congenital malformations of integument), Q84.4 is specifically for congenital leukonychia. Related codes cover congenital alopecia (Q84.0), congenital morphological disturbances of hair, not elsewhere classified (Q84.1), other congenital malformations of hair (Q84.2), Anonychia (Q84.3), enlarged and hypertrophic nails (Q84.5), other congenital malformations of nails (Q84.6), other specified congenital malformations of integument (Q84.8) and congenital malformation of integument, unspecified (Q84.9).

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 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.