ICD-10 code for planus chronicus lichen

The ICD-10-CM code for planus chronicus lichen is L43.9 (Lichen planus, unspecified). The official index lists 9 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L43.9.

Within L43, choose L43.9 (unspecified) only when documentation doesn't support a more specific option: hypertrophic lichen planus (L43.0), bullous lichen planus (L43.1), Lichenoid drug reaction (L43.2), subacute (active) lichen planus (L43.3) and other lichen planus (L43.8).

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 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.