2024 ICD-10-CM Diagnosis Code C34.90

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Malignant neoplasm of unspecified part of unspecified bronchus or lung

  • C34.90 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Malignant neoplasm of unsp part of unsp bronchus or lung
  • The 2024 edition of ICD-10-CM C34.90 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of C34.90 – other international versions of ICD-10 C34.90 may differ.

Applicable To

  • Lung cancer NOS

The following code(s) above C34.90 contain annotation back-references

 that may be applicable to C34.90:

  • C00-D49  Neoplasms
  • C30-C39  Malignant neoplasms of respiratory and intrathoracic organs
  • C34  Malignant neoplasm of bronchus and lung

Approximate Synonyms

  • Bronchial cancer
  • Bronchioloalveolar carcinoma – disorder
  • Bronchoalveolar cancer of the lung
  • Cancer of the lung
  • Cancer of the lung, adenocarcinoma
  • Cancer of the lung, adenocarcinoma, stage 1
  • Cancer of the lung, adenocarcinoma, stage 2
  • Cancer of the lung, adenocarcinoma, stage 3
  • Cancer of the lung, adenocarcinoma, stage 4
  • Cancer of the lung, large cell
  • Cancer of the lung, large cell, stage 1
  • Cancer of the lung, large cell, stage 2
  • Cancer of the lung, large cell, stage 3
  • Cancer of the lung, large cell, stage 4
  • Cancer of the lung, non small cell, stage 1
  • Cancer of the lung, non small cell, stage 2
  • Cancer of the lung, non small cell, stage 3
  • Cancer of the lung, non small cell, stage 4
  • Cancer of the lung, small cell
  • Cancer of the lung, small cell, stage 1
  • Cancer of the lung, small cell, stage 2
  • Cancer of the lung, small cell, stage 3
  • Cancer of the lung, small cell, stage 4
  • Cancer of the lung, squamous cell
  • Cancer of the lung, squamous cell, stage 1
  • Cancer of the lung, squamous cell, stage 2
  • Cancer of the lung, squamous cell, stage 3
  • Cancer of the lung, squamous cell, stage 4
  • Cancer, lung, non small cell
  • Eaton-lambert syndrome due to small cell carcinoma of lung
  • Eaton-lambert syndrome due to small cell lung cancer
  • Extensive stage primary small cell carcinoma of lung
  • Extensive stage small cell carcinoma, lung
  • Large cell carcinoma of lung
  • Large cell carcinoma of lung, tnm stage 1
  • Large cell carcinoma of lung, tnm stage 2
  • Large cell carcinoma of lung, tnm stage 3
  • Large cell carcinoma of lung, tnm stage 4
  • Limited stage primary small cell carcinoma of lung
  • Limited stage small cell carcinoma, lung
  • Lung cancer metastatic to unspecified site
  • Metastasis from malignant tumor of lung
  • Non-small cell carcinoma of lung, tnm stage 1
  • Non-small cell carcinoma of lung, tnm stage 2
  • Non-small cell carcinoma of lung, tnm stage 3
  • Non-small cell carcinoma of lung, tnm stage 4
  • Non-small cell lung cancer
  • Primary adenocarcinoma of lung
  • Primary adenocarcinoma of lung, stage 1
  • Primary adenocarcinoma of lung, stage 2
  • Primary adenocarcinoma of lung, stage 3
  • Primary adenocarcinoma of lung, stage 4
  • Primary malignant neoplasm of bronchus
  • Primary malignant neoplasm of lung
  • Primary small cell malignant neoplasm of lung, stage 1
  • Primary small cell malignant neoplasm of lung, stage 2
  • Primary small cell malignant neoplasm of lung, stage 3
  • Primary small cell malignant neoplasm of lung, stage 4
  • Small cell carcinoma of lung
  • Squamous cell carcinoma of lung
  • Squamous cell carcinoma of lung, tnm stage 1
  • Squamous cell carcinoma of lung, tnm stage 2
  • Squamous cell carcinoma of lung, tnm stage 3
  • Squamous cell carcinoma of lung, tnm stage 4

Clinical Information

  • A carcinoma originating in the lung. Lung carcinomas usually arise from the epithelium that lines the bronchial tree (bronchogenic carcinomas), and are classified as small cell or non-small cell carcinomas. Non-small cell lung carcinomas are usually adenocarcinomas, squamous cell carcinomas, or large cell carcinomas. Metastatic carcinomas to the lung are also common, and can be difficult to distinguish from primary tumors.
  • Cancer that forms in tissues of the lung, usually in the cells lining air passages. The two main types are small cell lung cancer and non-small cell lung cancer. These types are diagnosed based on how the cells look under a microscope.

ICD-10-CM C34.90 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 180 Respiratory neoplasms with mcc
  • 181 Respiratory neoplasms with cc
  • 182 Respiratory neoplasms without cc/mcc

Convert C34.90 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to C34.90: