ICD-10-CM C37 is the diagnosis code for Malignant neoplasm of thymus. This code falls under the section "Malignant neoplasms of respiratory and intrathoracic organs" within Chapter 2 — Neoplasms (C00-D49). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as C37. They are mutually exclusive:
Understanding where C37 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C37 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C37 is the ICD-10-CM diagnosis code for "Malignant neoplasm of thymus". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C37 is located in Section C30-C39 — "Malignant neoplasms of respiratory and intrathoracic organs" within Chapter 2 of the ICD-10-CM Tabular List.
Use C37 when the patients documented diagnosis matches "Malignant neoplasm of thymus" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Malignant neoplasm of thymus is C37.
Yes, C37 can be used as a primary diagnosis code since it is billable and specific.
C37 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C37 include: malignant carcinoid tumor of the thymus (C7A.091).
Yes, C37 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.