ICD-10 Code I12.9 – Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I12.9 – Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
What it is
This code identifies chronic kidney disease linked to hypertension when the CKD stage is 1 through 4, or when the stage is not specified. It reflects a documented cause-and-effect relationship between the kidney disease and high blood pressure.
Clinical signs
Clinical features vary; refer to documentation. You may see a history of hypertension with chronic kidney disease, reduced kidney function, or provider notes stating hypertensive kidney disease.
When to use this code
Use I12.9 when the provider documents hypertensive chronic kidney disease and the CKD is stage 1 to 4, or the stage is unspecified. Code the CKD stage separately if documented, and verify the hypertension-kidney disease relationship in the record.
Do not use for
Do not use this code for hypertension without chronic kidney disease, or for end-stage renal disease. If the record does not support a hypertensive cause, check documentation.
Coding tip
Confirm both the hypertension diagnosis and the CKD stage, then assign the additional CKD code when the stage is documented.