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    v1.0.28
    OpenPayerBilling CodesDisorders of other endocrine glandsICD-10-CM e32-diseases-of-thymus
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    ICD-10-CM Code For Diseases Of Thymus: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group E32 includes nonmalignant disorders of the thymus such as thymic hyperplasia and other thymic dysfunctions that affect immune and endocrine interactions. These ICD-10-CM diagnosis codes are used to document clinical presentations involving thymic enlargement, associated systemic symptoms, or post-surgical status affecting the thymus, capturing disease severity and organ involvement. Accurate coding within the ICD-10-CM E32 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM E32: Diseases Of Thymus Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group E32 covers disorders of the thymus, including thymic hyperplasia and other nonmalignant thymic conditions that affect immune and endocrine interactions. These diagnoses target the thymus gland in the anterior mediastinum and can influence immune function and associated systemic symptoms. Accurate coding matters for correct clinical records and reimbursement because it captures disease severity, laterality when applicable, and supports claim adjudication.

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    When to Use

    Use a code from this group when the clinical documentation specifies a thymic disorder such as thymic hyperplasia or other nonmalignant thymic conditions. Select the most specific code that reflects the documented condition, clinical complexity, and any procedural or postoperative status related to the thymus.

    ICD-10-CM Codes

    4 rows

    ICD-10-CM CodeDescription
    E32.0Persistent hyperplasia of thymus
    E32.1Abscess of thymus
    E32.8Other diseases of thymus
    E32.9Disease of thymus, unspecified

    DRG Codes

    5 rows

    DRG CodeDescription
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    814Reticuloendothelial and Immunity Disorders with MCC
    815Reticuloendothelial and Immunity Disorders with CC
    816Reticuloendothelial and Immunity Disorders without CC/MCC

    Typical Clinical Scenarios

    • An adult patient presents to the emergency department with acute chest pain, dyspnea, and signs of superior vena cava (SVC) syndrome such as facial swelling and venous distention. Imaging reveals a large anterior mediastinal mass consistent with an aggressive thymic neoplasm causing vascular compression; biopsy confirms thymoma. A thymus-related diagnosis code is assigned to capture the neoplastic process causing the acute presentation. Typical codes: E32.0, E32.8
    • A middle-aged person is seen in endocrinology clinic for progressive fatigue, unexplained weight loss, and paraneoplastic features such as myasthenia gravis symptoms; cross-sectional imaging identifies a chronic anterior mediastinal mass consistent with thymoma under surveillance or preoperative evaluation. The encounter documents the chronic thymic disorder and its association with neurologic autoimmune manifestations, so a thymus disorder code from this group is used for ongoing management and care planning. Typical codes: E32.0, E32.9
    • An older adult hospitalized for sepsis has an incidental finding of thymic enlargement on chest CT that is nonneoplastic or unspecified in nature; the thymic change is noted as a comorbidity potentially relevant to treatment decisions but not the primary reason for admission. A nonneoplastic or unspecified thymus disorder code is assigned to capture the incidental or secondary thymic condition in the problem list. Typical codes: E32.1, E32.9

    Related Codes

    E20-HYPOPARATHYROIDISM

    ICD-10-CM Code For Hypoparathyroidism: Group Overview

    E21-HYPERPARATHYROIDISM-AND-PARATHYROID-DISORDERS

    ICD-10-CM Code For Hyperparathyroidism And Other Disorders Of Parathyroid Gland: Group Overview

    E22-HYPERFUNCTION-OF-PITUITARY-GLAND

    ICD-10-CM Code For Hyperfunction Of Pituitary Gland: Group Overview

    E23-HYPOFUNCTION-OF-PITUITARY-GLAND

    ICD-10-CM Code For Hypofunction And Other Disorders Of The Pituitary Gland: Group Overview

    E24-CUSHINGS-SYNDROME

    ICD-10-CM Code For Cushing's Syndrome: Group Overview

    E25-ADRENOGENITAL-DISORDERS

    ICD-10-CM Code For Adrenogenital Disorders: Group Overview

    E26-HYPERALDOSTERONISM

    ICD-10-CM Code For Hyperaldosteronism: Group Overview

    E27-OTHER-DISORDERS-OF-ADRENAL-GLAND

    ICD-10-CM Code For Other Disorders Of Adrenal Gland: Group Overview

    E28-OVARIAN-DYSFUNCTION

    ICD-10-CM Code For Ovarian Dysfunction: Group Overview

    E29-TESTICULAR-DYSFUNCTION

    ICD-10-CM Code For Testicular Dysfunction: Group Overview

    Showing 1–10 of 13

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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