ICD-10 Code E32 – Diseases of thymus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E32 – Diseases of thymus
What it is
E32 identifies disorders of the thymus gland, including conditions such as thymic hyperplasia, atrophy, or other nonmalignant thymus disease. Use it when the record documents a thymus disorder rather than a neoplasm.
Clinical signs
Clinical features vary; refer to documentation. Thymus disorders may be found on imaging or during evaluation for associated immune or neuromuscular problems, but the code itself depends on the documented thymic condition.
When to use this code
Use E32 when the provider documents a disease of the thymus and does not specify a more exact diagnosis. It may fit notes describing thymic enlargement, thymic atrophy, or another nonmalignant thymus abnormality. If the chart names a tumor, cyst, or myasthenia-related finding, code the documented condition instead.
Do not use for
Do not use E32 for malignant thymus neoplasms or for generalized autoimmune disease without a thymus diagnosis. If the finding is only an incidental imaging note and no disorder is confirmed, check documentation.
Coding tip
Code the specific thymus condition documented, and query if the record says only “thymus abnormality” without a clear diagnosis.