What is the correct code for a patient diagnosed with idiopathic hypertension?

The appropriate code for idiopathic hypertension is I10. This code is used to classify essential (primary) hypertension, which aligns well with idiopathic hypertension because the term "idiopathic" implies that the hypertension has no identifiable cause. Essential hypertension forms the majority of hypertension cases and is fundamentally what is captured under the I10 code in the ICD-10 coding system.

The other choices represent different types or complications of hypertension. For instance, I12 pertains to hypertension due to chronic kidney disease, while I13 is for hypertension heart and chronic kidney disease, suggesting a causal relationship with these conditions. I11 is used for hypertension with heart disease, indicating a more complex scenario where hypertension is a contributing factor to cardiac issues. Since the case in question refers specifically to idiopathic hypertension without additional complications or underlying conditions, I10 is the most appropriate code.