---
title: "ICD-10-CM N18.2: Chronic kidney disease, stage 2 (mild) | BillingBrief"
description: "ICD-10-CM code N18.2: Chronic kidney disease, stage 2 (mild). Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/n18.2/"
language: "en"
---

# N18.2 Chronic kidney disease, stage 2 (mild)

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

**Official ICD-10-CM description:** Chronic kidney disease, stage 2 (mild)

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   congenital renal failure (P96.0)
-   drug- and heavy-metal-induced tubulo-interstitial and tubular conditions (N14.-)
-   extrarenal uremia ([R39.2](https://billingbrief.com/icd10/r39.2/))
-   hemolytic-uremic syndrome (D59.3-)
-   hepatorenal syndrome (K76.7)
-   postpartum hepatorenal syndrome (O90.41)
-   posttraumatic renal failure (T79.5)
-   prerenal uremia ([R39.2](https://billingbrief.com/icd10/r39.2/))
-   renal failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4)
-   renal failure following labor and delivery (O90.41)
-   renal failure postprocedural (N99.0)

### Code first

Code the underlying condition first, then this code.

-   any associated:
-   diabetic chronic kidney disease (E08.22, E09.22, [E10.22](https://billingbrief.com/icd10/e10.22/), [E11.22](https://billingbrief.com/icd10/e11.22/), E13.22)
-   hypertensive chronic kidney disease (I12.-, I13.-)

### Use additional code

Add a second code for the following, when documented.

-   code, if applicable, to identify:
-   associated cachexia (E88.A)
-   kidney transplant status (Z94.0)

## Related codes

-   [`N18.1` Chronic kidney disease, stage 1 ICD-10-CM](https://billingbrief.com/icd10/n18.1/)
-   [`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/)
-   [`N18.4` Chronic kidney disease, stage 4 (severe) ICD-10-CM](https://billingbrief.com/icd10/n18.4/)
-   [`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 N18.2 a billable code?

Yes. N18.2 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/).