N18.32 — Chronic kidney disease, stage 3b

N18.32

ICD-10 Chapter 14: Genitourinary System — illustrative image — Chapter 14: Diseases of the genitourinary system (N00–N99) — illustrative image

What this code means

Chronic kidney disease stage 3b: a moderately-to-severely reduced filtration rate (GFR 30–44).

Also called: ckd stage 3b.

When this code is used

Used for chronic kidney disease, stage 3b.

Where it sits in ICD-10-CM

Code N18.32 belongs to Chapter 14: Diseases of the genitourinary system, which covers codes N00–N99 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: Dialysis

Related symptoms

Fatigue

Related anatomy

Kidneys

Frequently asked questions

What is ICD-10-CM code N18.32?

N18.32 is the ICD-10-CM diagnosis code for “Chronic kidney disease, stage 3b”. Chronic kidney disease stage 3b: a moderately-to-severely reduced filtration rate (GFR 30–44).

When is code N18.32 used?

Used for chronic kidney disease, stage 3b. It belongs to Chapter 14 of ICD-10-CM (Diseases of the genitourinary 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.