N18.9 Chronic kidney disease, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

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

Applies from N18 Chronic kidney disease (CKD)

Code first

• any associated:
• diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22)
• hypertensive chronic kidney disease (I12.-, I13.-)

Use additional code

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

MS-DRG index

Defines the logic of DRG(s) 008 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 585.9 Chronic kidney disease, unspecified

Code annotations containing back-references to N18.9

Back-references to N18.9

• Use Additional: I12.9 Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease ("code to identify the stage of chronic kidney disease (N18.1-N18.4, N18.9)")
• Use Additional: I13.0 Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease ("code to identify stage of chronic kidney disease (N18.1-N18.4, N18.9)")
• Use Additional: I13.10 Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease ("code to identify the stage of chronic kidney disease (N18.1-N18.4, N18.9)")
• Type 1 Excludes: N19 Unspecified kidney failure ("chronic uremia (N18.9)")
• Type 1 Excludes: N28.9 Disorder of kidney and ureter, unspecified ("chronic renal insufficiency (N18.9)")

Back-references to N18

• Code Also: D59.3 Hemolytic-uremic syndrome ("chronic kidney disease (N18.-)")
• Code First: D63.1 Anemia in chronic kidney disease ("underlying chronic kidney disease (CKD) (N18.-)")
• Code Also: E20.810 Autosomal dominant hypocalcemia ("chronic kidney disease (N18.-)")
• Code First: I5A Non-ischemic myocardial injury (non-traumatic) ("chronic kidney disease (CKD) (N18.-)")
• Use Additional: I75.81 Atheroembolism of kidney ("code for any associated acute kidney failure and chronic kidney disease (N17.-, N18.-)")
• Type 1 Excludes: N19 Unspecified kidney failure ("chronic kidney disease (N18.-)")

Diagnosis Index entries for N18.9

• Apoplexia, apoplexy, apoplectic › uremic
• Disease, diseased › kidney (functional) (pelvis) › chronic
• Disease, diseased › renal (functional) (pelvis) › chronic
• Failure, failed › renal › chronic
• Glomerulonephritis › diffuse › sclerosing
• Glomerulonephritis › sclerosing, diffuse
• Insufficiency, insufficient › kidney › chronic
• Insufficiency, insufficient › renal (acute) › chronic
• Neuropathy, neuropathic › uremic
• Paralysis, paralytic (complete) (incomplete) › uremic
• Pericarditis (with decompensation) (with effusion) › uremic
• Polyneuropathy (peripheral) › in (due to) › uremia
• Retinitis › albuminurica
• Retinitis › renal
• Syndrome › uremia, chronic
• Uremia, uremic › with › polyneuropathy
• Uremia, uremic › chronic NOS

Nearby codes

• 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 (this code)