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Home/Diagnosis/ICD-10 Coding for Prerenal Azotemia

ICD-10 Coding for Prerenal Azotemia

R39.2
N17.9

Complete ICD-10-CM coding and documentation guide for icd-10 coding for prerenal azotemia includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Extrarenal Azotemia
Functional Renal Failure
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Key Information: ICD-10 Coding for Prerenal Azotemia

Essential facts and insights about ICD-10 Coding for Prerenal Azotemia

Use ICD-10 code R39.2 for extrarenal azotemia, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Extrarenal azotemia

Billable Code
R39.2
Billable

Diagnostic Criteria

clinical:
  • • BUN/Cr ratio >20:1
  • • FENa <1%
  • • Urine osmolality >500 mOsm/kg
coding:
  • • Documented prerenal azotemia with underlying cause
documentation:
  • • Explicit mention of prerenal azotemia and clinical indicators

Applicable To

  • • Prerenal azotemia

Important Notes

  • • Ensure documentation of clinical indicators and underlying cause for accurate coding.

Acute kidney failure, unspecified

Billable Code
N17.9
Billable

Diagnostic Criteria

clinical:
  • • Creatinine rise by 0.3 mg/dL within 48 hours
  • • Presence of granular casts

Applicable To

  • • Acute renal failure

Important Notes

  • • Ensure differentiation from prerenal azotemia based on clinical improvement and lab findings.
Ancillary Codes

Additional codes that may be used with this diagnosis

E86.0

Dehydration

Use when dehydration is the underlying cause of prerenal azotemia.

R65.21

Septic shock

Use when sepsis is the underlying cause of prerenal azotemia.

Frequently Asked Questions

What is the ICD-10 code for prerenal azotemia?

The ICD-10 code for prerenal azotemia is R39.2, used when clinical indicators such as BUN/Cr ratio >20:1 and FENa <1% are documented.

When should R39.2 be used instead of N17.9?

Use R39.2 for prerenal azotemia with reversible hypoperfusion. Use N17.9 if renal function does not improve or granular casts are present.

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