What should be assigned when conditions classified to codes N18.1 - N18.9 are present?

The presence of conditions classified to codes N18.1 - N18.9 indicates varying stages of chronic kidney disease (CKD). These codes specifically detail the severity of the kidney function impairment. When reporting these conditions, it is important to also consider any associated conditions that may be present as a complication of chronic kidney disease, particularly hypertension.

Category I12 is designated for hypertension secondary to chronic kidney disease. Assigning this category reflects the relationship between the CKD and the hypertension, which is a common occurrence in patients with worsening kidney function. Accurately coding this relationship is essential for properly documenting the patient's overall health and ensuring that the medical records accurately reflect the complexity of their conditions.

Assigning any other category would not appropriately capture the essential link between chronic kidney disease and the related hypertensive condition, thus potentially leading to an incomplete picture of the patient's clinical situation.