2025 ICD-10-CM Diagnosis Code N18.9

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Chronic kidney disease, unspecified

  • N18.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM N18.9 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of N18.9 – other international versions of ICD-10 N18.9 may differ.

Applicable To

  • Chronic renal disease
  • Chronic renal failure NOS
  • Chronic renal insufficiency
  • Chronic uremia NOS
  • Diffuse sclerosing glomerulonephritis NOS

The following code(s) above N18.9 contain annotation back-references

 that may be applicable to N18.9:

  • N00-N99  Diseases of the genitourinary system
  • N17-N19  Acute kidney failure and chronic kidney disease
  • N18  Chronic kidney disease (CKD)

Approximate Synonyms

  • Acute with chronic renal failure
  • Acute-on-chronic renal failure
  • Anemia due to chronic kidney disease
  • Anemia in chronic kidney dis
  • Anemia in kidney disease
  • Anemia of chronic renal failure
  • Arteriolar nephrosclerosis (kidney disease)
  • Benign arteriolar nephrosclerosis
  • Benign hypertensive heart and chronic renal disease
  • Benign hypertensive heart and chronic renal disease with congestive heart failure
  • Benign hypertensive heart and ckd
  • Benign hypertensive heart disease and chronic renal disease
  • Chronic kidney disease
  • Chronic kidney disease due to benign hypertension
  • Chronic kidney disease due to drug induced diabetes mellitus
  • Chronic kidney disease due to hypertension
  • Chronic kidney disease due to secondary diabetes mellitus
  • Chronic kidney disease due to type 1 diabetes mellitus
  • Chronic kidney disease due to type 2 diabetes mellitus
  • Chronic progressive renal failure
  • Chronic renal failure
  • Chronic renal failure syndrome
  • Chronic renal impairment
  • Chronic renal impairment associated with type 2 diabetes mellitus
  • Diabetes type 1 with chronic kidney disease
  • Diabetes type 2 with chronic kidney disease
  • Diabetes type 2 with kidney disease
  • Drug induced diabetes with diabetic kidney disease
  • Erythropoietin resistance in anemia of chronic kidney disease
  • Hypertension due to kidney disease in pregnancy
  • Hypertension due to to kidney disease in pregnancy
  • Hypertension in chronic kidney disease due to type 1 diabetes mellitus
  • Hypertension in chronic kidney disease due to type 2 diabetes mellitus
  • Hypertensive chronic kidney disease
  • Hypertensive heart and chronic kidney disease
  • Hypertensive heart and chronic kidney disease with congestive heart failure
  • Hypertensive heart and kidney disease
  • Hypertensive heart and kidney disease with chf
  • Hypertensive heart/kidney dis w/ congestive heart fail
  • Hypertensive kidney disease, chronic
  • Hypertensive renal disease complicating and/or reason for care during puerperium
  • Iron deficiency anemia in ckd after erythropoietin
  • Malignant arteriolar nephrosclerosis
  • Malignant htn ckd, stage 1 (gfr>= 90)
  • Malignant htn ckd, stage 2 (gfr60-89)
  • Malignant htn ckd, stage 3 (gfr30-59)
  • Malignant htn ckd, stage 4 (gfr15-29)
  • Malignant hypertensive chronic kidney disease
  • Malignant hypertensive chronic kidney disease stage 1
  • Malignant hypertensive chronic kidney disease stage 2
  • Malignant hypertensive chronic kidney disease stage 3
  • Malignant hypertensive chronic kidney disease stage 4
  • Malignant hypertensive ckd (kidney disease)
  • Malignant hypertensive heart and chronic renal disease with congestive heart failure
  • Preexisting hypertension from chronic kidney disease, after childbirth
  • Preexisting hypertensive chronic kidney disease in childbirth
  • Preexisting hypertensive chronic kidney disease in pregnancy
  • Preexisting hypertensive heart and chronic kidney disease in childbirth
  • Preexisting hypertensive heart and chronic kidney disease in postpartum
  • Preexisting hypertensive heart and chronic kidney disease in pregnancy
  • Preexisting hypertensive heart and chronic kidney disease, postpartum (after childbirth)
  • Renal insufficiency, chronic progressive
  • Secondary diabetes with chronic kidney disease

Clinical Information

  • A disorder characterized by gradual and usually permanent loss of kidney function resulting in renal failure.
  • A neoplastic or non-neoplastic condition affecting the kidney. Representative examples of non-neoplastic conditions include glomerulonephritis and nephrotic syndrome. Representative examples of neoplastic conditions include benign processes (e.g., renal lipoma and renal fibroma) and malignant processes (e.g., renal cell carcinoma and renal lymphoma).
  • A term referring to any disease affecting the kidneys.
  • An irreversible and usually progressive reduction in renal function in which both kidneys have been damaged by a variety of diseases to the extent that they are unable to adequately remove the metabolic products from the blood and regulate the body’s electrolyte composition and acid-base balance. (from msh98)
  • Chronic, irreversible renal failure.
  • Gradual and usually permanent loss of kidney function resulting in renal failure. Causes include diabetes, hypertension, and glomerulonephritis.
  • Impairment of health or a condition of abnormal functioning of the kidney.
  • Impairment of the renal function due to chronic kidney damage.
  • Irreversible and usually progressive reduction in renal function in which both kidneys have been damaged by a variety of diseases to the extent that they are unable to adequately remove the metabolic products from the blood and regulate the body’s electrolyte composition and acid-base balance.
  • Pathological processes of the kidney or its component tissues.
  • The end-stage of chronic renal insufficiency. It is characterized by the severe irreversible kidney damage (as measured by the level of proteinuria) and the reduction in glomerular filtration rate to less than 15 ml per min (kidney foundation: kidney disease outcome quality initiative, 2002). These patients generally require hemodialysis or kidney transplantation.
  • You have two kidneys, each about the size of your fist. Their main job is to filter wastes and excess water out of your blood to make urine. They also keep the body’s chemical balance, 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.treatment may include medicines to lower blood pressure, control blood glucose, and lower blood cholesterol. Ckd can get worse over time. Ckd may lead to kidney failure. The only treatment options for kidney failure are dialysis or a kidney transplantation.you can take steps to keep your kidneys healthier longer:
    • choose foods with less salt (sodium)
    • keep your blood pressure below 130/80
    • keep your blood glucose in the target range, if you have diabetes
  • Your kidneys are two bean-shaped organs, each about the size of your fists. They are located near the middle of your back, just below the rib cage. Inside each kidney about a million tiny structures called nephrons filter blood. They remove waste products and extra water, which become urine. The urine flows through tubes called ureters to your bladder, which stores the urine until you go to the bathroom. Most kidney diseases attack the nephrons. This damage may leave kidneys unable to remove wastes. Causes can include genetic problems, injuries, or medicines. You are at greater risk for kidney disease if you have diabetes, high blood pressure, or a close family member with kidney disease. chronic kidney disease damages the nephrons slowly over several years. Other kidney problems include:
    • cancer
    • cysts
    • stones
    • infections
    your doctor can run tests to find out if you have kidney disease. If your kidneys fail completely, a kidney transplant or dialysis can replace the work your kidneys normally do.

ICD-10-CM N18.9 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 008 Simultaneous pancreas and kidney transplant
  • 019 Simultaneous pancreas and kidney transplant with hemodialysis
  • 682 Renal failure with mcc
  • 683 Renal failure with cc
  • 684 Renal failure without cc/mcc

Convert N18.9 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Code annotations containing back-references to N18.9:

  • Type 1 Excludes: N19, N28.9
  • Use Additional: I12.9, I13.10

Diagnosis Index entries containing back-references to N18.9:

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