ICD-10-CM C39: Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs

ICD-10-CM Diagnosis Code (2025)

Official Description for C39

Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs

Coding Notes & Guidelines for C39

Excludes1: Not Coded Here
  • intrathoracic malignant neoplasm NOS (C76.1)
  • thoracic malignant neoplasm NOS (C76.1)
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)
Inclusion Terms

Malignant neoplasm of respiratory tract NOS

Child Codes (More Specific Codes for C39):

C39.0 - Malignant neoplasm of upper respiratory tract, part unspecified C39.9 - Malignant neoplasm of lower respiratory tract, part unspecified

About ICD-10-CM Code C39 (Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs)

ICD-10-CM code C39 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C39 became effective on October 1, 2024.

This page provides detailed information about C39 - Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs.