ICD-10-CM Codes for CKD (Chronic Kidney Disease)

Updated for 2025. Coding stages 1 through 5 and End Stage Renal Disease (ESRD).

CKD Stages (Category N18)

Chronic Kidney Disease codes are categorized by stage. It is crucial to document the stage based on GFR (Glomerular Filtration Rate).

Code Description
N18.1 Chronic kidney disease, stage 1
N18.2 Chronic kidney disease, stage 2 (mild)
N18.30 Chronic kidney disease, stage 3 (unspecified)
N18.31 Chronic kidney disease, stage 3a
N18.32 Chronic kidney disease, stage 3b
N18.4 Chronic kidney disease, stage 4 (severe)
N18.5 Chronic kidney disease, stage 5
N18.6 End stage renal disease (ESRD)

Coding Relationship

Do not forget the "Use Additional Code" notes. If the patient is on dialysis, you should also code Z99.2 (Dependence on renal dialysis).

Frequently Asked Questions

Can I code 'Renal Insufficiency' as CKD?

No. 'Renal insufficiency' maps to N28.9, which is unspecified disorders of kidney and ureter. To use N18.x codes, the documentation must specifically state 'Chronic Kidney Disease'.

What is the code for ESRD?

N18.6 is the code for End Stage Renal Disease.

Code CKD Combinations Correctly

Hypertension, Diabetes, and Heart Failure interaction with CKD requires precise coding.

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