E32.8Other diseases of thymus

E32.8 is the ICD-10-CM diagnosis code for other diseases of thymus. It belongs to category E32 (diseases of thymus), block E20-E35 (disorders of other endocrine glands) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E32, choose E32.8 (Other diseases of thymus) only when documentation doesn't support a more specific option: persistent hyperplasia of thymus (E32.0), abscess of thymus (E32.1) and disease of thymus, unspecified (E32.9).

Don't report E32.8 together with the conditions in its Excludes1 note: aplasia or hypoplasia with immunodeficiency (D82.1) and thymoma (D15.0).

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 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), 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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 254.8 (other specified diseases of thymus gland).