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C39

Non-billable

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

C39 is the ICD-10-CM code for Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs. It is a non-billable category code — use a more specific child code such as C39.0 for billing.

Status
Header (non-billable)
Chapter
C00-D49
Subcodes
2
Edition
FY2026

C00-D49 Neoplasms

What this means — in plain language

MedlinePlus · NIH

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Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

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)

Frequently asked questions

What is ICD-10 code C39?
C39 is the ICD-10-CM code for "Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs". It falls under C00-D49 Neoplasms.
Is C39 a billable code?
No — C39 is a non-billable header code. Use a more specific child code (such as C39.0) for billing.
What are the subcodes of C39?
C39 has 2 more specific child codes, including C39.0, C39.9.
What is excluded from C39?
Excludes1 (not coded here): intrathoracic malignant neoplasm NOS (C76.1); thoracic malignant neoplasm NOS (C76.1).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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