ICD10
ICD-10 Code C34.0: Malignant neoplasm of main bronchus
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents malignant neoplasm of main bronchus in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
2Neoplasms (C00-D49)
block
C00-C96Malignant neoplasms
block
C00-C75Malignant neoplasms, stated or presumed to be primary (of specified sites), and certain specified histologies, except neuroendocrine, and of lymphoid, hematopoietic and related tissue
block
C30-C39Malignant neoplasms of respiratory and intrathoracic organs
category
C34Malignant neoplasm of bronchus and lung
currentC34
Official coding notes
Inclusion terms
- Malignant neoplasm of carina
- Malignant neoplasm of hilus (of lung)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
OncologistGeneral PhysicianPulmonologist
Related codes
Sibling codes
C34.1Malignant neoplasm of upper lobe, bronchus or lungC34.2Malignant neoplasm of middle lobe, bronchus or lungbillableC34.3Malignant neoplasm of lower lobe, bronchus or lungC34.8Malignant neoplasm of overlapping sites of bronchus and lungC34.9Malignant neoplasm of unspecified part of bronchus or lung
Mapped diagnoses and classifications
SNOMED_CT 1287970008high
Bilateral primary malignant neoplasm of main bronchi
Source: SNOMED International ICD-10 map
SNOMED_CT 372120003high
Carcinoma of main bronchus
Source: SNOMED International ICD-10 map
SNOMED_CT 187857006high
Malignant neoplasm of carina of trachea
Source: SNOMED International ICD-10 map
SNOMED_CT 372065009high
Malignant neoplasm of main bronchus
Source: SNOMED International ICD-10 map
SNOMED_CT 1078891000119104high
Primary adenocarcinoma of left main bronchus
Source: SNOMED International ICD-10 map
SNOMED_CT 1078941000119103high
Primary adenocarcinoma of right main bronchus
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
C34.0
Replacement codes
C34.00 — Malignant neoplasm of unspecified main bronchusC34.01 — Malignant neoplasm of right main bronchusC34.02 — Malignant neoplasm of left main bronchus
Common synonyms
Malignant neoplasm of main bronchus
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.