N17.9 Acute kidney failure, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Acute kidney injury (nontraumatic)

Excludes2 (not included here)

• traumatic kidney injury (S37.0-)

Applies from N17 Acute kidney failure

Excludes1 (never code together)

• posttraumatic renal failure (T79.5)

Code also

• associated underlying condition

Risk adjustment (HCC)

• CMS-HCC V22: HCC 135 — Acute Renal Failure
• ESRD V24: HCC 135

MS-DRG index

Defines the logic of DRG(s) 673-675 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 584.9 Acute kidney failure, unspecified

Code annotations containing back-references to N17.9

Back-references to N17.9

• Use Additional: B33.4 Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] ("code to identify any associated acute kidney failure (N17.9)")
• Type 2 Excludes: S37.0 Injury of kidney ("acute kidney injury (nontraumatic) (N17.9)")

Back-references to N17

• Code Also: D59.3 Hemolytic-uremic syndrome ("acute kidney failure (N17.-)")
• Type 2 Excludes: I12 Hypertensive chronic kidney disease ("acute kidney failure (N17.-)")
• Use Additional: I16.1 Hypertensive emergency ("acute kidney injury (N17.-)")
• Code First: I5A Non-ischemic myocardial injury (non-traumatic) ("acute kidney failure (N17.-)")
• Use Additional: I75.81 Atheroembolism of kidney ("code for any associated acute kidney failure and chronic kidney disease (N17.-, N18.-)")
• Use Additional: M31.11 Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] ("acute kidney failure (N17.-)")
• Code Also: M35.81 Multisystem inflammatory syndrome ("acute kidney failure (N17.-)")
• Type 2 Excludes: N14.11 Contrast-induced nephropathy ("acute kidney failure (N17.-)")
• Type 1 Excludes: N19 Unspecified kidney failure ("acute kidney failure (N17.-)")
• Use Additional: R65.11 Systemic inflammatory response syndrome (SIRS) of non-infectious origin with acute organ dysfunction ("acute kidney failure (N17.-)")
• Use Additional: R65.2 Severe sepsis ("acute kidney failure (N17.-)")

Diagnosis Index entries for N17.9

• Failure, failed › kidney › acute
• Failure, failed › renal › acute
• Injury › kidney › acute (nontraumatic)
• Necrosis, necrotic (ischemic) › kidney (bilateral) › acute

Nearby codes

• 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 (this code)