C37 – Malignant neoplasm of thymus

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of respiratory and intrathoracic organs

Billable code

ICD-10-CM code C37
Code
C37 (claims format: C37)
Description
Malignant neoplasm of thymus
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
C30-C39 Malignant neoplasms of respiratory and intrathoracic organs

Notes for C37

Excludes1 (not coded here):
  • malignant carcinoid tumor of the thymus (C7A.091)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block C30-C39

Includes:
  • malignant neoplasm of middle ear
Excludes1 (not coded here):
  • mesothelioma (C45.-)

Index terms for C37

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code C37?

C37 is the ICD-10-CM code for malignant neoplasm of thymus, in the block C30-C39 (Malignant neoplasms of respiratory and intrathoracic organs).

Is C37 a billable code?

Yes. C37 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.