Malignant neoplasm of thymus (C37) ICD-10-CM
The C37 code range covers malignant neoplasm of thymus with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- malignant carcinoid tumor of the thymus C7A.091
Codes in the C37 Range 1 codes · 1 billable
- C37 Malignant neoplasm of thymus
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C37 range.
Malignant Thymus Neoplasm
A primary or metastatic malignant neoplasm involving the thymus. This category includes malignant thymomas, thymic lymphomas, primary thymic carcinomas, and metastatic carcinomas from other anatomic sites.
About the C37 Code Range
Cancer involving the thymus can start there or spread from another part of the body. Within the group for cancers of breathing and chest organs, C37 identifies the thymus as the organ involved.
Questions About This Page
How many billable codes are in the C37 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C37 range classify?
The range classifies malignant neoplasm of thymus. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
