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ICD-10 Guide
ICD-10 CodesN17.8

N17.8

Billable

Other acute kidney failure

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/18/2025

Code Description

ICD-10 N17.8 is a billable code used to indicate a diagnosis of other acute kidney failure.

Key Diagnostic Point:

Acute kidney failure, also known as acute kidney injury (AKI), is characterized by a rapid decline in renal function, typically defined as an increase in serum creatinine levels or a decrease in urine output. The condition can arise from various causes, including prerenal factors (such as dehydration or reduced blood flow), intrinsic renal factors (like acute tubular necrosis or glomerulonephritis), and postrenal factors (such as obstruction of the urinary tract). Acute kidney failure can be reversible if identified and treated promptly, but it may lead to chronic kidney disease (CKD) if not managed effectively. Patients with AKI may require renal replacement therapy, including dialysis, especially if they present with severe electrolyte imbalances or fluid overload. The staging of CKD is crucial for understanding the progression of kidney disease, and patients with AKI may transition to CKD if they have pre-existing conditions. Transplant considerations arise when patients progress to end-stage renal disease (ESRD), necessitating a multidisciplinary approach to care. Accurate coding of N17.8 is essential for appropriate reimbursement and quality of care metrics.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to acute kidney failure
  • Differentiation from chronic kidney disease
  • Need for precise documentation of renal function tests
  • Potential for concurrent diagnoses affecting coding

Audit Risk Factors

  • Inadequate documentation of the cause of acute kidney failure
  • Failure to document renal function tests and their results
  • Misclassification of acute kidney injury as chronic
  • Lack of clarity in treatment plans and follow-up care

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Detailed documentation of renal function tests, treatment plans, and patient history.

Common Clinical Scenarios

Patients presenting with acute kidney injury due to dehydration, nephrotoxic medications, or post-surgical complications.

Billing Considerations

Ensure accurate staging of CKD if applicable and document any renal replacement therapy provided.

Emergency Medicine

Documentation Requirements

Thorough documentation of initial assessment, lab results, and interventions performed.

Common Clinical Scenarios

Patients presenting with acute kidney injury secondary to sepsis or acute volume depletion.

Billing Considerations

Document the timeline of events leading to AKI and any immediate interventions taken.

Coding Guidelines

Inclusion Criteria

Use N17.8 When
  • According to ICD
  • 10 coding guidelines, N17
  • 8 should be used when the specific cause of acute kidney failure is not classified elsewhere
  • Coders must ensure that documentation supports the diagnosis and that any underlying conditions are also coded appropriately

Exclusion Criteria

Do NOT use N17.8 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

90935CPT Code

Hemodialysis

Clinical Scenario

Used for patients with acute kidney failure requiring renal replacement therapy.

Documentation Requirements

Document the indication for dialysis, patient response, and any complications.

Specialty Considerations

Nephrology specialists should ensure that the reason for dialysis is clearly linked to the diagnosis of acute kidney failure.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of acute kidney failure, enabling better tracking of patient outcomes and resource utilization. N17.8 provides a distinct code for cases that do not fit into other specified categories, enhancing the granularity of data collection.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of acute kidney failure, enabling better tracking of patient outcomes and resource utilization. N17.8 provides a distinct code for cases that do not fit into other specified categories, enhancing the granularity of data collection.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of acute kidney failure, enabling better tracking of patient outcomes and resource utilization. N17.8 provides a distinct code for cases that do not fit into other specified categories, enhancing the granularity of data collection.

Resources

Clinical References

  • •
    Kidney Disease: Improving Global Outcomes (KDIGO)

Coding & Billing References

  • •
    Kidney Disease: Improving Global Outcomes (KDIGO)

Frequently Asked Questions

What is the difference between acute kidney failure and chronic kidney disease?

Acute kidney failure is a rapid decline in kidney function, often reversible, while chronic kidney disease is a gradual loss of kidney function over time, typically irreversible.