2021 ICD-10-CM Code N18.3

Chronic kidney disease, stage 3 (moderate)

Version 2021
Replaced Code
Non-Billable Code

Not Valid for Submission

N18.3 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of chronic kidney disease, stage 3 (moderate). The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

ICD-10:N18.3
Short Description:Chronic kidney disease, stage 3 (moderate)
Long Description:Chronic kidney disease, stage 3 (moderate)

Code Classification

Specific Coding for Chronic kidney disease, stage 3 (moderate)

Header codes like N18.3 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for chronic kidney disease, stage 3 (moderate):

  • N18.30 - Chronic kidney disease, stage 3 unspecified
  • N18.31 - Chronic kidney disease, stage 3a
  • N18.32 - Chronic kidney disease, stage 3b

Replaced Code

This code was replaced in the 2021 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2020. This code was replaced for the FY 2021 (October 1, 2020 - September 30, 2021).


  • N18.30 - Chronic kidney disease, stage 3 unspecified
  • N18.31 - Chronic kidney disease, stage 3a
  • N18.32 - Chronic kidney disease, stage 3b

Convert N18.3 to ICD-9 Code

Information for Patients


Chronic Kidney Disease

Also called: CKD

You have two kidneys, each about the size of your fist. Their main job is to filter your blood. They remove wastes and extra water, which become urine. They also keep the body's chemicals balanced, help control blood pressure, and make hormones.

Chronic kidney disease (CKD) means that your kidneys are damaged and can't filter blood as they should. This damage can cause wastes to build up in your body. It can also cause other problems that can harm your health. Diabetes and high blood pressure are the most common causes of CKD.

The kidney damage occurs slowly over many years. Many people don't have any symptoms until their kidney disease is very advanced. Blood and urine tests are the only way to know if you have kidney disease.

Treatments cannot cure kidney disease, but they may slow kidney disease. They include medicines to lower blood pressure, control blood sugar, and lower cholesterol. CKD may still get worse over time. Sometimes it can lead to kidney failure. If your kidneys fail, you will need dialysis or a kidney transplantation.

You can take steps to keep your kidneys healthier longer:

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


[Learn More]

Code History

  • FY 2021 - Code Deleted, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)