L98.418Non-pressure chronic ulcer of buttock with other specified severity

L98.418 is the ICD-10-CM diagnosis code for Non-pressure chronic ulcer of buttock with other specified severity. It belongs to category L98 (other disorders of skin and subcutaneous tissue, not elsewhere classified), block L80-L99 (other disorders of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within L98.41, choose L98.418 (with other specified severity) only when documentation doesn't support a more specific option: limited to breakdown of skin (L98.411), with fat layer exposed (L98.412), with necrosis of muscle (L98.413), with necrosis of bone (L98.414), with muscle involvement without evidence of necrosis (L98.415), with bone involvement without evidence of necrosis (L98.416) and with unspecified severity (L98.419).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 573 (Skin Graft for Skin Ulcer or Cellulitis with MCC, relative weight 6.3575), DRG 574 (Skin Graft for Skin Ulcer or Cellulitis with CC, relative weight 3.5674), DRG 575 (Skin Graft for Skin Ulcer or Cellulitis without CC/MCC, relative weight 1.8797), DRG 592 (Skin Ulcers with MCC, relative weight 1.9101), DRG 593 (Skin Ulcers with CC, relative weight 1.1575) and DRG 594 (Skin Ulcers without CC/MCC, relative weight 0.7801), 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.

It was added in FY2018, effective October 1, 2017.

Before ICD-10, this condition was coded in ICD-9-CM as 707.8 (chronic ulcer of other specified sites).