ICD-10 code for nail congenital displacement

The ICD-10-CM code for nail congenital displacement is Q84.6 (Other congenital malformations of nails). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q84.6.

Within Q84, choose Q84.6 (Other congenital malformations of nails) only when documentation doesn't support a more specific option: congenital alopecia (Q84.0), congenital morphological disturbances of hair, not elsewhere classified (Q84.1), other congenital malformations of hair (Q84.2), Anonychia (Q84.3), congenital leukonychia (Q84.4), enlarged and hypertrophic nails (Q84.5), 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.