---
title: "ICD-10-CM N18.4: Chronic kidney disease, stage 4 (severe) | BillingBrief"
description: "ICD-10-CM code N18.4: Chronic kidney disease, stage 4 (severe). Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/n18.4/"
language: "en"
---

# N18.4 Chronic kidney disease, stage 4 (severe)

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Chronic kidney disease, stage 4 (severe)

## Related codes

-   [`N18.1` Chronic kidney disease, stage 1 ICD-10-CM](https://billingbrief.com/icd10/n18.1/)
-   [`N18.2` Chronic kidney disease, stage 2 (mild) ICD-10-CM](https://billingbrief.com/icd10/n18.2/)
-   [`N18.30` Chronic kidney disease, stage 3 unspecified ICD-10-CM](https://billingbrief.com/icd10/n18.30/)
-   [`N18.31` Chronic kidney disease, stage 3a ICD-10-CM](https://billingbrief.com/icd10/n18.31/)
-   [`N18.32` Chronic kidney disease, stage 3b ICD-10-CM](https://billingbrief.com/icd10/n18.32/)
-   [`N18.5` Chronic kidney disease, stage 5 ICD-10-CM](https://billingbrief.com/icd10/n18.5/)
-   [`N18.6` End stage renal disease ICD-10-CM](https://billingbrief.com/icd10/n18.6/)
-   [`N18.9` Chronic kidney disease, unspecified ICD-10-CM](https://billingbrief.com/icd10/n18.9/)

## Common questions

### Is N18.4 a billable code?

Yes. N18.4 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

N18 Chronic kidney disease (CKD)

Chapter

Diseases of the genitourinary system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).