ICD-10-CM 2027
ICD-10 code for thymus gland degeneration
From the official ICD-10-CM alphabetic index entry “Degeneration, degenerative › thymus (gland)”. Page updated September 29, 2026.
About coding thymus gland degeneration
The ICD-10-CM code for thymus gland degeneration is E32.8 (Other diseases of thymus). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on E32.8.
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.
More specific thymus gland degeneration codes (official index)
- fatty E32.8 — Other diseases of thymus
Don't confuse with (Excludes1 for E32.8)
Common questions about thymus gland degeneration ICD-10 codes
What is the ICD-10 code for thymus gland degeneration?
- E32.8 — Other diseases of thymus. More specific codes apply when the documentation supports them: E32.8.
What is the ICD-10 code for fatty thymus gland degeneration?
- E32.8 — Other diseases of thymus.
Is E32.8 billable?
- Yes. E32.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E32.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E32.8 as a principal diagnosis.
Is E32.8 a CC or MCC?
- No. E32.8 is neither a CC nor an MCC under MS-DRG v44.0.