2021 ICD-10-CM Diagnosis Code N18

Chronic kidney disease (CKD)

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • N18 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM N18 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of N18 - other international versions of ICD-10 N18 may differ.
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Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code to identify kidney transplant status, if applicable, (
    ICD-10-CM Diagnosis Code Z94.0

    Kidney transplant status

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Z94.0
    )
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • any associated:
  • diabetic chronic kidney disease (
    ICD-10-CM Diagnosis Code E08.22

    Diabetes mellitus due to underlying condition with diabetic chronic kidney disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
    Use Additional
    • code to identify stage of chronic kidney disease (N18.1-N18.6)
    E08.22
    ,
    ICD-10-CM Diagnosis Code E09.22

    Drug or chemical induced diabetes mellitus with diabetic chronic kidney disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Use Additional
    • code to identify stage of chronic kidney disease (N18.1-N18.6)
    E09.22
    ,
    ICD-10-CM Diagnosis Code E10.22

    Type 1 diabetes mellitus with diabetic chronic kidney disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Use Additional
    • code to identify stage of chronic kidney disease (N18.1-N18.6)
    E10.22
    ,
    ICD-10-CM Diagnosis Code E11.22

    Type 2 diabetes mellitus with diabetic chronic kidney disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Use Additional
    • code to identify stage of chronic kidney disease (N18.1-N18.6)
    E11.22
    ,
    ICD-10-CM Diagnosis Code E13.22

    Other specified diabetes mellitus with diabetic chronic kidney disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Use Additional
    • code to identify stage of chronic kidney disease (N18.1-N18.6)
    E13.22
    )
  • hypertensive chronic kidney disease (
    ICD-10-CM Diagnosis Code I12
    • I12 Hypertensive chronic kidney disease
      • I12.0 Hypertensive chronic kidney disease with stag...
      • I12.9 Hypertensive chronic kidney disease with stag...
    I12.-
    ,
    ICD-10-CM Diagnosis Code I13
    • I13 Hypertensive heart and chronic kidney disease...
      • I13.0 Hypertensive heart and chronic kidney disease...
      • I13.1 Hypertensive heart and chronic kidney disease...
        • I13.10 Hypertensive heart and chronic kidney disease...
        • I13.11 Hypertensive heart and chronic kidney disease...
      • I13.2 Hypertensive heart and chronic kidney disease...
    I13.-
    )
The following code(s) above N18 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to N18:
  • N00-N99
    2021 ICD-10-CM Range N00-N99

    Diseases of the genitourinary system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the genitourinary system
  • N17-N19
    2021 ICD-10-CM Range N17-N19

    Acute kidney failure and chronic kidney disease

    Type 2 Excludes
    • congenital renal failure (P96.0)
    • drug- and heavy-metal-induced tubulo-interstitial and tubular conditions (N14.-)
    • extrarenal uremia (R39.2)
    • hemolytic-uremic syndrome (D59.3)
    • hepatorenal syndrome (K76.7)
    • postpartum hepatorenal syndrome (O90.4)
    • posttraumatic renal failure (T79.5)
    • prerenal uremia (R39.2)
    • renal failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4)
    • renal failure following labor and delivery (O90.4)
    • renal failure postprocedural (N99.0)
    Acute kidney failure and chronic kidney disease
Clinical Information
  • A disorder characterized by gradual and usually permanent loss of kidney function resulting in renal failure.
  • 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 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.
  • 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
Code 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
Code annotations containing back-references to N18:
  • Code First: D63.1
    ICD-10-CM Diagnosis Code D63.1

    Anemia in chronic kidney disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
    Applicable To
    • Erythropoietin resistant anemia (EPO resistant anemia)
    Code First
    • underlying chronic kidney disease (CKD) (N18.-)
  • Type 1 Excludes: N19
    ICD-10-CM Diagnosis Code N19

    Unspecified kidney failure

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Uremia NOS
    Type 1 Excludes
    • acute kidney failure (N17.-)
    • chronic kidney disease (N18.-)
    • chronic uremia (N18.9)
    • extrarenal uremia (R39.2)
    • prerenal uremia (R39.2)
    • renal insufficiency (acute) (N28.9)
    • uremia of newborn (P96.0)
  • Includes: I12
    ICD-10-CM Diagnosis Code I12

    Hypertensive chronic kidney disease

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • any condition in N18 and N26 - due to hypertension
    • arteriosclerosis of kidney
    • arteriosclerotic nephritis (chronic) (interstitial)
    • hypertensive nephropathy
    • nephrosclerosis
    Type 1 Excludes
    • hypertension due to kidney disease (I15.0, I15.1)
    • renovascular hypertension (I15.0)
    • secondary hypertension (I15.-)
    Type 2 Excludes
    • acute kidney failure (N17.-)
  • Use Additional: I75.81
    ICD-10-CM Diagnosis Code I75.81

    Atheroembolism of kidney

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Use Additional
    • code for any associated acute kidney failure and chronic kidney disease (N17.-, N18.-)
ICD-10-CM Codes Adjacent To N18
N15.1 Renal and perinephric abscess
N15.8 Other specified renal tubulo-interstitial diseases
N15.9 Renal tubulo-interstitial disease, unspecified
N16 Renal tubulo-interstitial disorders in diseases classified elsewhere
N17 Acute kidney failure
N17.0 Acute kidney failure with tubular necrosis
N17.1 Acute kidney failure with acute cortical necrosis
N17.2 Acute kidney failure with medullary necrosis
N17.8 Other acute kidney failure
N17.9 Acute kidney failure, unspecified
N18 Chronic kidney disease (CKD)
N18.1 Chronic kidney disease, stage 1
N18.2 Chronic kidney disease, stage 2 (mild)
N18.3 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
N18.4 Chronic kidney disease, stage 4 (severe)
N18.5 Chronic kidney disease, stage 5
N18.6 End stage renal disease
N18.9 Chronic kidney disease, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.