2025 ICD-10-CM Diagnosis Code E32.0

by

Persistent hyperplasia of thymus

  • E32.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM E32.0 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of E32.0 – other international versions of ICD-10 E32.0 may differ.

Applicable To

  • Hypertrophy of thymus

The following code(s) above E32.0 contain annotation back-references

 that may be applicable to E32.0:

  • E00-E89  Endocrine, nutritional and metabolic diseases
  • E20-E35  Disorders of other endocrine glands
  • E32  Diseases of thymus

Approximate Synonyms

  • Persistent hyperplasia thymus

Clinical Information

  • Enlargement of the thymus. A condition described in the late 1940’s and 1950’s as pathological thymic hypertrophy was status thymolymphaticus and was treated with radiotherapy. Unnecessary removal of the thymus was also practiced. It later became apparent that the thymus undergoes normal physiological hypertrophy, reaching a maximum at puberty and involuting thereafter. The concept of status thymolymphaticus has been abandoned. Thymus hyperplasia is present in two thirds of all patients with myasthenia gravis. (from segen, dictionary of modern medicine, 1992; cecil textbook of medicine, 19th ed, p1486)

ICD-10-CM E32.0 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 814 Reticuloendothelial and immunity disorders with mcc
  • 815 Reticuloendothelial and immunity disorders with cc
  • 816 Reticuloendothelial and immunity disorders without cc/mcc

Convert E32.0 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to E32.0:

  • Enlargement, enlarged – see also Hypertrophy
    • thymus E32.0 (gland) (congenital)
  • Failure, failed
    • involution, thymus E32.0 (gland)
  • Hyperplasia, hyperplastic
    • thymus E32.0 (gland) (persistent)
  • Hypertrophy, hypertrophic
    • thymic, thymus E32.0 (gland) (congenital)
  • Persistence, persistent (congenital)
    • thymus E32.0 (gland) (hyperplasia)
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