I12.9 — Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease

I12.9

ICD-10 Chapter 9: Circulatory System — illustrative image — Chapter 9: Diseases of the circulatory system (I00–I99) — illustrative image

What this code means

Kidney damage caused by long-standing high blood pressure, with chronic kidney disease stage 1 to 4.

Also called: hypertensive chronic kidney disease, hypertensive nephropathy.

When this code is used

Used for hypertensive chronic kidney disease with stage 1–4 CKD, together with the N18 stage code.

Where it sits in ICD-10-CM

Code I12.9 belongs to Chapter 9: Diseases of the circulatory system, which covers codes I00–I99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Learn more about this condition

Condition guide: Hypertension

Related anatomy

Kidneys

Frequently asked questions

What is ICD-10-CM code I12.9?

I12.9 is the ICD-10-CM diagnosis code for “Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease”. Kidney damage caused by long-standing high blood pressure, with chronic kidney disease stage 1 to 4.

When is code I12.9 used?

Used for hypertensive chronic kidney disease with stage 1–4 CKD, together with the N18 stage code. It belongs to Chapter 9 of ICD-10-CM (Diseases of the circulatory system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.