ICD-10 code for tinea

The ICD-10-CM code for tinea is B35.9 (Dermatophytosis, unspecified). The official index lists 23 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B35.9.

Within B35, choose B35.9 (unspecified) only when documentation doesn't support a more specific option: tinea barbae and tinea capitis (B35.0), tinea unguium (B35.1), tinea manuum (B35.2), tinea pedis (B35.3), tinea corporis (B35.4), tinea imbricata (B35.5), tinea cruris (B35.6) and other dermatophytoses (B35.8).

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.