ICD-10-CM 2027
ICD-10 code for AKI (acute kidney injury)
Confirmed by the official ICD-10-CM index entry “injury › kidney › acute (nontraumatic)”. Page updated September 29, 2026.
About coding AKI
The ICD-10-CM code for AKI (acute kidney injury) is N17.9 (Acute kidney failure, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N17.9.
It is also searched as acute kidney failure, acute renal failure.
Within N17, choose N17.9 (unspecified) only when documentation doesn't support a more specific option: with tubular necrosis (N17.0), with acute cortical necrosis (N17.1), with medullary necrosis (N17.2) and other acute kidney failure (N17.8).
The conditions in its Excludes2 note aren't part of N17.9, but may be coded alongside it if the patient has both: traumatic kidney injury (S37.0-).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Related AKI codes
Common questions about AKI ICD-10 codes
What is the ICD-10 code for AKI?
- N17.9 — Acute kidney failure, unspecified. More specific codes apply when the documentation supports them: N17.0, N17.1, N17.2, N17.8.
What is the ICD-10 code for acute kidney failure with tubular necrosis?
- N17.0 — Acute kidney failure with tubular necrosis.
What is the ICD-10 code for acute kidney failure with acute cortical necrosis?
- N17.1 — Acute kidney failure with acute cortical necrosis.
What is the ICD-10 code for acute kidney failure with medullary necrosis?
- N17.2 — Acute kidney failure with medullary necrosis.
What is the ICD-10 code for other acute kidney failure?
- N17.8 — Other acute kidney failure.
Is N17.9 billable?
- Yes. N17.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N17.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N17.9 as a principal diagnosis.
Is N17.9 a CC or MCC?
- N17.9 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.