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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