ICD-10 code for bullous dermatosis

The ICD-10-CM code for bullous dermatosis is L13.9 (Bullous disorder, 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 L13.9.

Within L13, choose L13.9 (Bullous disorder, unspecified) only when documentation doesn't support a more specific option: dermatitis herpetiformis (L13.0), Subcorneal pustular dermatitis (L13.1) and other specified bullous disorders (L13.8).

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 595 (Major Skin Disorders with MCC, relative weight 2.0239) and DRG 596 (Major Skin Disorders without MCC, relative weight 1.1071), 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.