C39Header code — not billable
Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs
Short description: Malig neoplm of sites in the resp sys and intrathorac organs
- Chapter
- 2. Neoplasms
- Category
- C39
- Effective date
- October 1, 2026
Related codes in category C39
Frequently asked questions
What is ICD-10 code C39?
C39 is an ICD-10-CM diagnosis code for Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs.
Is C39 a billable code?
No. C39 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is C39 in?
C39 falls under Chapter 2: Neoplasms.
When did C39 become effective?
C39 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C39?
C39 belongs to category C39, which includes 2 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.