C37 MALIGNANT NEOPLASM OF THYMUS

Code Information

  • Diagnosis Code: C37
  • Short Description: Malignant neoplasm of thymus
  • Long Description: Malignant neoplasm of thymus
  • Code Version: 2025 ICD-10-CM

The code C37 is VALID for claim submission

Code Classification

Synonyms

  • Malignant neoplasm of thymus gland
  • Malignant thymoma
  • Neuroendocrine carcinoma of thymus
  • Primary malignant neoplasm of thymus
  • Primary malignant thymoma
  • Primary small cell neuroendocrine carcinoma of thymus
  • Primary thymic carcinoma
  • Stage I: Grossly and microscopically encapsulated
  • Stage IIa: Microscopic transcapsular invasion
  • Stage IIb: Macroscopic capsular invasion into thymic or surrounding fat, or grossly adherent to, but not breaking through, mediastinal pleura or pericardium
  • Stage III: Macroscopic invasion of neighboring organs
  • Stage IVa: Pleural or pericardial dissemination
  • Stage IVb: Hematogenous or lymphatic dissemination
  • Thymic epithelial neoplasm stage finding
  • Thymic epithelial neoplasm stage finding
  • Thymic epithelial neoplasm stage finding
  • Thymic epithelial neoplasm stage finding
  • Thymic epithelial neoplasm stage finding
  • Thymic epithelial neoplasm stage finding
  • Thymoma
  • Thymoma
  • Thymoma
  • Thymoma
  • Thymoma
  • Thymoma
  • Thymoma
  • Thymoma type A
  • Thymoma type AB
  • Thymoma type B
  • Type C thymoma

Diagnostic Related Group(s)

The code C37 is grouped in the following Diagnostic Related Group(s) MS-DRG V43.0

  1. Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Major O.r. Procedures With Mcc (826)
  2. Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Major O.r. Procedures With Cc (827)
  3. Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Major O.r. Procedures Without Cc/mcc (828)
  4. Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Other Procedures With Cc/mcc (829)
  5. Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Other Procedures Without Cc/mcc (830)
  6. Other Myeloproliferative Disorders Or Poorly Differentiated Neoplastic Diagnoses With Mcc (843)
  7. Other Myeloproliferative Disorders Or Poorly Differentiated Neoplastic Diagnoses With Cc (844)
  8. Other Myeloproliferative Disorders Or Poorly Differentiated Neoplastic Diagnoses Without Cc/mcc (845)

References to Index of Diseases and Injuries

The code C37 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Type 1 Excludes Notes:
    • malignant carcinoid tumor of the thymus (@C7A.091*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
C37 Right Arrow 164.0 Malignant neopl thymus
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
This page was last updated on: 10/1/2025
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