What small cell lung cancer ICD codes can I use?
If you’re looking for small cell lung cancer ICD codes but are having trouble doing so, there are no ICD-10 codes with small cell lung cancer in their names. That doesn’t mean there aren’t any ICD-10 codes for that particular problem, though. You just need to adjust your search term to small cell lung carcinoma, which is a type of small cell lung cancer. Here are the ICD-10 codes related to this problem:
- C34.90 - Malignant neoplasm of unspecified part of unspecified bronchus or lung
This ICD-10 code is used on patients confirmed to have a malignant neoplasm (a cancerous tumor). In the context of this ICD-10 code, it’s located in either the bronchus or lungs, but it’s not specified which one and where exactly the tumor is.
- C34.91 - Malignant neoplasm of unspecified part of right bronchus or lung
This is the same as Item 1, but it’s confirmed that the tumor is in the right bronchus or lung, but it’s not clear where exactly in the right bronchus or lung the tumor is.
- C34.92 - Malignant neoplasm of unspecified part of left bronchus or lung
This is the same as Item 1, but it’s confirmed that the tumor is in the left bronchus or lung. It’s unclear where the tumor is in the left bronchus or lung.
- C78.00 - Secondary malignant neoplasm of unspecified lung
This ICD-10 code is used on patients confirmed to have a secondary malignant neoplasm in an unspecified lung. A secondary malignant neoplasm emerges from a pre-existing lower grade lesion. It emerged because cancer has spread from somewhere to another organ (in this case, the lungs), or from a cancer treatment complication.
- C78.01 - Secondary malignant neoplasm of right lung
This is the same as Item 4, but this time, it’s confirmed that the secondary malignant neoplasm is in the right lung.
- C78.02 - Secondary malignant neoplasm of left lung
This is the same as Item 4, but this time, it’s confirmed that the secondary malignant neoplasm is in the left lung.

