C39 ICD-10-CM Code: Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
C39Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs
ICD-10-CM diagnosis code · United States clinical modification
Where C39 sits
- 1
Chapter 2
Neoplasms (C00-D49)
- 2
Section
Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)
- 3
Category C39
Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs
- 4
Code C39
Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs
Codes under C39
C39 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for C39.
Code first
No “code first” instruction is listed for C39.
Use additional code
- code to identify:
- exposure to environmental tobacco smoke (Z77.22)
- exposure to tobacco smoke in the perinatal period (P96.81)
- history of tobacco dependence (Z87.891)
- occupational exposure to environmental tobacco smoke (Z57.31)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Excludes1
Conditions that should not be reported together with this code.
- intrathoracic malignant neoplasm NOS (C76.1)
- thoracic malignant neoplasm NOS (C76.1)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for C39.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code C39 mean?
C39 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs.”
Is C39 a billable or specific ICD-10-CM code?
No. C39 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is C39 located in ICD-10-CM?
C39 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of respiratory and intrathoracic organs (C30-C39) (C30–C39), under category C39, Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs.
What coding notes are listed for C39?
No inclusion terms are listed for C39 in this reference record. No code-first instruction is listed. Additional-code instructions: code to identify:; exposure to environmental tobacco smoke (Z77.22); exposure to tobacco smoke in the perinatal period (P96.81); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); tobacco dependence (F17.-); tobacco use (Z72.0). Excludes1 notes: intrathoracic malignant neoplasm NOS (C76.1); thoracic malignant neoplasm NOS (C76.1). No Excludes2 note is listed.