When hypertension and chronic kidney disease (CKD) are documented together, ICD-10-CM assumes a cause-and-effect relationship.
I12.9 = Hypertensive chronic kidney disease with stage 1–4 CKD
N18.2 = CKD stage 2
I12.0 is only for CKD stage 5 or ESRD, which does not apply here.
Therefore, the correct code combination is I12.9, N18.2.
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