AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2023 Issue 1; Ask the Editor
Large Cell Neuroendocrine Lung Cancer
An 83-year-old male with known cancer of the right lung with metastasis to the liver presented with worsening dyspnea on exertion and fatigue. The patient’s lung carcinoma was described as poorly differentiated with neuroendocrine differentiation, non-small cell carcinoma favoring large cell with neuroendocrine differentiation as well as large cell neuroendocrine cancer. The Alphabetic Index under Carcinoma, large cell/small cell, leads to category C34, Malignant neoplasm of bronchus and lung. However, the Index under Carcinoma, neuroendocrine, instructs to see also Tumor, neuroendocrine. What code is assigned for the lung cancer in this case? ...
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Article Overview
This premium coding article examines a lung cancer scenario with neuroendocrine features and explains how the case is approached within ICD-10-CM classification guidance. It is intended for coders, auditors, and billing professionals who need to compare lung malignancy terminology with neuroendocrine tumor indexing references and understand the coding research process for an unusual cancer presentation.
Why This Topic Matters
Cases involving overlapping lung carcinoma and neuroendocrine terminology can be difficult to classify correctly, especially when terminology in the medical record does not map cleanly to a single index entry. This article helps readers understand the relevant ICD-10-CM source structure and why accurate code selection matters for cancer reporting and reimbursement workflows.
Article Sections
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Case Presentation and Coding Question
Introduces a patient scenario involving a right lung malignancy with metastatic disease and poses the coding question addressed by the article.
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Index-Based Coding Guidance
Summarizes the relevant ICD-10-CM index pathways discussed in the article and frames the classification issue for the reported lung cancer terminology.
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Code Assignment
States the final coding outcome for the lung cancer case.
What You Will Learn
- How a lung cancer case with neuroendocrine terminology is evaluated for ICD-10-CM classification
- Which parts of the ICD-10-CM alphabetic index are discussed in relation to the case
- How the article frames the distinction between common lung carcinoma indexing and neuroendocrine tumor indexing
- The coding outcome presented for this specific clinical scenario
Who Should Read This
- Medical coders
- Coding auditors
- Billing specialists
- Compliance staff
- Cancer registry personnel
Codes Discussed
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