C34.1 – Malignant neoplasm of upper lobe, bronchus or lung

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of respiratory and intrathoracic organs

Non-billable header

ICD-10-CM code C34.1
Code
C34.1 (claims format: C341)
Description
Malignant neoplasm of upper lobe, bronchus or lung
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
C30-C39 Malignant neoplasms of respiratory and intrathoracic organs
Parent codes
C34

Billable codes under C34.1

C34.1 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

C34 – Malignant neoplasm of bronchus and lung

Excludes1 (not coded here):
  • Kaposi's sarcoma of lung (C46.5-)
  • malignant carcinoid tumor of the bronchus and lung (C7A.090)
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)

Block C30-C39

Includes:
  • malignant neoplasm of middle ear
Excludes1 (not coded here):
  • mesothelioma (C45.-)

Index terms for C34.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in C34

Frequently asked questions

What is ICD-10 code C34.1?

C34.1 is the ICD-10-CM code for malignant neoplasm of upper lobe, bronchus or lung, in the block C30-C39 (Malignant neoplasms of respiratory and intrathoracic organs).

Is C34.1 a billable code?

No. C34.1 is a header code with more specific child codes; report one of the billable codes listed above.

What category does C34.1 belong to?

It belongs to category C34 – Malignant neoplasm of bronchus and lung.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.