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ICD-10 Guide
ICD-10 CodesN17.9

N17.9

Billable

Acute kidney failure, unspecified

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

Code Description

ICD-10 N17.9 is a billable code used to indicate a diagnosis of acute kidney failure, unspecified.

Key Diagnostic Point:

Acute kidney failure, also known as acute kidney injury (AKI), is a rapid decline in kidney function, characterized by an increase in serum creatinine levels or a decrease in urine output. This condition can occur due to various factors, including prerenal causes (such as dehydration or reduced blood flow), intrinsic renal causes (like acute tubular necrosis or glomerulonephritis), and postrenal causes (such as urinary obstruction). The unspecified nature of this code indicates that the exact cause of the acute kidney failure has not been determined or documented. Clinically, AKI can lead to significant complications, including fluid overload, electrolyte imbalances, and the need for renal replacement therapy, such as dialysis. It is crucial to monitor kidney function closely in patients with risk factors, including chronic kidney disease (CKD), diabetes, and hypertension, as they are more susceptible to acute kidney injury. Management may involve addressing the underlying cause, optimizing fluid balance, and, in severe cases, initiating dialysis to support renal function until recovery occurs.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of potential underlying causes that may not be specified
  • Need for precise documentation to differentiate from chronic kidney disease
  • Potential for overlapping symptoms with other renal conditions
  • Variability in clinical presentation and laboratory findings

Audit Risk Factors

  • Inadequate documentation of the cause of acute kidney failure
  • Failure to differentiate between acute and chronic kidney conditions
  • Lack of clear clinical indicators for renal replacement therapy
  • Inconsistent lab results not correlating with clinical findings

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with sudden changes in urine output, elevated creatinine levels, or requiring dialysis.

Billing Considerations

Ensure clear documentation of the cause of AKI and any interventions performed.

Emergency Medicine

Documentation Requirements

Thorough assessment of vital signs, lab results, and immediate interventions.

Common Clinical Scenarios

Patients presenting with dehydration, sepsis, or acute illness leading to renal impairment.

Billing Considerations

Document the timeline of events leading to AKI for accurate coding.

Coding Guidelines

Inclusion Criteria

Use N17.9 When
  • According to ICD
  • 10 coding guidelines, N17
  • 9 should be used when the specific cause of acute kidney failure is not documented
  • Coders must ensure that the documentation supports the diagnosis and that any related conditions are also coded appropriately

Exclusion Criteria

Do NOT use N17.9 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 need for dialysis, including lab results and clinical status.

Specialty Considerations

Nephrologists must ensure that the rationale for dialysis is clearly documented.

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, improving the ability to capture the nuances of the condition and its management. N17.9 provides a broad category for unspecified cases, which can help in tracking epidemiological data and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of acute kidney failure, improving the ability to capture the nuances of the condition and its management. N17.9 provides a broad category for unspecified cases, which can help in tracking epidemiological data and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of acute kidney failure, improving the ability to capture the nuances of the condition and its management. N17.9 provides a broad category for unspecified cases, which can help in tracking epidemiological data and resource allocation.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

When should I use N17.9?

Use N17.9 when a patient is diagnosed with acute kidney failure, and the specific cause is not documented. Ensure that the clinical documentation supports the diagnosis.