C39
⚠ Non-billable
Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs
ICD-10-CM · FY2026 · Neoplasms
Code
C39
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code C39?
ICD-10-CM code C39 represents Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C39 billable?
No. C39 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C39 in?
C39 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C39 category
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