How is acute-on-chronic renal failure coded in ICD-10?

Acute-on-chronic renal failure is coded using N17.9 for acute kidney failure and N18.x for the specific stage of chronic kidney disease.

What documentation is required for acute-on-chronic renal failure?

Documentation must include specific terminology, CKD stage, and lab trends such as creatinine levels and GFR.

ICD-10 Coding for Acute-on-Chronic Renal Failure(N17.9, E11.22, N17.0)

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Learn how to accurately code and document acute-on-chronic renal failure using ICD-10 codes N17.9 and N18.x. Ensure compliance with detailed documentation requirements.

Also known as:

Acute-on-Chronic Kidney DiseaseAcute Chronic Kidney Failure

Related ICD-10 Code Ranges

Complete code families applicable to Acute-on-Chronic Renal Failure

N00-N99Primary Range

Diseases of the genitourinary system

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
N17.9	Acute kidney failure, unspecified	Use when acute kidney failure is present without specific etiology documented.	≥1.5x baseline creatinine within 7 days ≥0.3 mg/dL increase in 48 hours
N18.3	Chronic kidney disease, stage 3	Use when CKD stage 3 is documented.	GFR 30-59 mL/min/1.73m²

Primary ICD-10-CM Codes

Acute kidney failure, unspecified

N17.9Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Acute kidney failure with tubular necrosisN17.0

Use when documentation specifies tubular necrosis.

Chronic kidney disease, stage 4N18.4

Use when GFR is 15-29 mL/min/1.73m².

Documentation & Coding Risks

Avoid these common issues when documenting Acute-on-Chronic Renal Failure.

Documenting 'renal insufficiency' instead of specific failure.

Impact

Clinical: Leads to misinterpretation of severity., Regulatory: Non-compliance with documentation standards., Financial: Potential for reduced reimbursement.

Mitigation

Educate providers on specific terminology., Use templates that prompt for detailed documentation.

Using unspecified codes when specific ones apply.

Impact

Reimbursement: May lead to lower reimbursement rates., Compliance: Non-compliance with coding guidelines., Data Quality: Decreases accuracy of patient records.

Mitigation

Ensure documentation specifies the stage of CKD and the cause of AKI.

Documentation of CKD stages

Impact

Inaccurate staging can lead to audit discrepancies.

Mitigation

Regular training on CKD staging criteria.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with N17.9.

Primary Code

N17.9

Acute kidney failure, unspecified

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ICD-10 codes6

Coding risks3

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ICD-10 Coding for Acute-on-Chronic Renal Failure(N17.9, E11.22, N17.0)

Documentation & Coding Risks

Frequently Asked Questions

How is acute-on-chronic renal failure coded in ICD-10?

What documentation is required for acute-on-chronic renal failure?

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