Is C39.9 a billable ICD-10 code?

Yes. C39.9 (Malignant neoplasm of lower respiratory tract, part unspecified) is billable and can be used for insurance claims. Always verify payer-specific requirements.

C39.9 ✓ Billable

Malignant neoplasm of lower respiratory tract, part unspecified

Q: What is ICD-10 code C39.9?

ICD-10-CM code C39.9 stands for "Malignant neoplasm of lower respiratory tract, part unspecified". It is a billable code in the Neoplasms chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Neoplasms

Code

C39.9

System

ICD-10-CM

Billable

Yes — valid for submission

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 C39.9?

ICD-10-CM code C39.9 represents Malignant neoplasm of lower respiratory tract, part unspecified. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.

Is C39.9 billable?

Yes. C39.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is C39.9 in?

C39.9 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.

Related codes in the C39 category

C39 Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs Non-billable C39.0 Malignant neoplasm of upper respiratory tract, part unspecified Billable

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