U.S. ICD-10-CM · FY 2027

C34 ICD-10-CM Code: Malignant neoplasm of bronchus and lung

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

C34

Malignant neoplasm of bronchus and lung

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where C34 sits

  1. 1

    Chapter 2

    Neoplasms (C00-D49)

  2. 2

    Section

    Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)

  3. 3

    Category C34

    Malignant neoplasm of bronchus and lung

  4. 4

    Code C34

    Malignant neoplasm of bronchus and lung

More specific choices

Codes under C34

C34 is a non-billable category. Choose the child code that best matches the documented diagnosis.

C34.0

Malignant neoplasm of main bronchus

C34.1

Malignant neoplasm of upper lobe, bronchus or lung

C34.2

Malignant neoplasm of middle lobe, bronchus or lung

C34.3

Malignant neoplasm of lower lobe, bronchus or lung

C34.8

Malignant neoplasm of overlapping sites of bronchus and lung

C34.9

Malignant neoplasm of unspecified part of bronchus or lung

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for C34.

Code first

No “code first” instruction is listed for C34.

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.

  • Kaposi's sarcoma of lung (C46.5-)
  • malignant carcinoid tumor of the bronchus and lung (C7A.090)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for C34.

Transparency

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.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code C34 mean?

C34 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm of bronchus and lung.”

Is C34 a billable or specific ICD-10-CM code?

No. C34 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 C34 located in ICD-10-CM?

C34 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of respiratory and intrathoracic organs (C30-C39) (C30–C39), under category C34, Malignant neoplasm of bronchus and lung.

What coding notes are listed for C34?

No inclusion terms are listed for C34 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: Kaposi's sarcoma of lung (C46.5-); malignant carcinoid tumor of the bronchus and lung (C7A.090). No Excludes2 note is listed.

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