Acute kidney failure and chronic kidney disease (N17-N19)
ICD-10 codes N17 to N19 are used to classify different types of kidney failure, including sudden onset acute kidney failure and long-term chronic kidney disease (CKD). These codes cover varying severities, causes, and stages of kidney impairment, guiding precise diagnosis and treatment decisions.
The N17 series focuses on acute kidney failure, such as acute tubular necrosis (N17.0), acute cortical necrosis (N17.1), and medullary necrosis (N17.2). These terms, including ischemic and toxic kidney injury, help coders identify specific acute damage causes. Code N18 details stages of chronic kidney disease, from stage 1 (mild) through end stage renal disease (N18.6), including conditions like diabetic nephropathy and hypertensive kidney disease. Definitions for stages 3a, 3b, 4, and 5 reflect progressively severe impairment, important for patient management and prognosis. Finally, N19 captures unspecified kidney failure when the failure’s characteristics or chronicity aren't clearly defined, covering complications like uremia and dialysis dependence. These codes incorporate synonyms clinicians may use to ensure accurate documentation and billing for kidney failure disorders.
Diseases of the genitourinary system (N00–N99)
Acute kidney failure and chronic kidney disease (N17-N19)
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
Chronic kidney disease (CKD) (N18)
- N19 Unspecified kidney failure
Unspecified kidney failure (N19)
Instructional Notations
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- 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 O90.41
- 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 O90.41
- renal failure postprocedural N99.0
