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Home/Diagnosis/ICD-10 Coding for Elevated BUN

ICD-10 Coding for Elevated BUN

R79.9
N18.3
E86.0

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

Also Known as:
High Blood Urea Nitrogen
Increased BUN
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Key Information: ICD-10 Coding for Elevated BUN

Essential facts and insights about ICD-10 Coding for Elevated BUN

Use ICD-10 code R79.9 for abnormal findings of blood chemistry, unspecified, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Abnormal findings of blood chemistry, unspecified

Billable Code
R79.9
Billable

Diagnostic Criteria

clinical_criteria:
  • • BUN >20 mg/dL without specific diagnosis
coding_criteria:
  • • No CKD or AKI documented

Applicable To

  • • Elevated BUN without a specific diagnosis

Important Notes

  • • Ensure no specific diagnosis is documented before using R79.9.

Chronic kidney disease, stage 3

Non-Billable
N18.3
Non-Billable

Applicable To

  • • CKD stage 3

Important Notes

  • • Ensure CKD stage is documented in the medical record.

Dehydration

Billable Code
E86.0
Billable

Applicable To

  • • Dehydration

Important Notes

  • • Document clinical signs of dehydration clearly.
Ancillary Codes

Additional codes that may be used with this diagnosis

E86.0

Dehydration

Use alongside R79.9 when dehydration is confirmed.

Frequently Asked Questions

What is the ICD-10 code for elevated BUN?

The ICD-10 code for elevated BUN without a specific diagnosis is R79.9. Use this code when elevated BUN is noted without an underlying condition like CKD or dehydration.

When should R79.9 be used for elevated BUN?

Use R79.9 for elevated BUN when no specific diagnosis such as CKD or dehydration is documented. Ensure repeat BUN levels are recorded.

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