What is the principal and secondary ICD-10-CM diagnosis code for hypertension due to a primary malignant neoplasm of the brain?

• A. I15.8, C71.9
• B. I15.9, C71.0
• C. I15.7, C71.1
• D. I15.6, C71.8

Answer: (A)

The principal diagnosis for this scenario is a secondary hypertension condition related to a primary malignant neoplasm of the brain. The ICD-10-CM code for hypertension due to another condition is I15.8, which specifically indicates secondary hypertension due to other specified conditions, such as a malignant neoplasm.

The secondary diagnosis, which identifies the underlying cause of the hypertension, is C71.9. This code corresponds to a malignant neoplasm of the brain, where the specific site is unspecified. In this case, it represents the primary malignant neoplasm that has led to the development of hypertension.

Choosing these particular codes accurately reflects the relationship between the malignant neoplasm and the resultant hypertension, showing a clear cause-and-effect link. Therefore, the selection of I15.8 for the hypertension and C71.9 for the neoplasm aligns correctly with the coding guidelines for reporting secondary hypertension caused by a malignancy.