N18.3
Chronic kidney disease, stage 3 (moderate)
Diseases of the genitourinary system Billable
Quick Reference
eGFR 30-59 mL/min/1.73m² for ≥3 months
Clinical Information
When to Use This Code
eGFR 30-59 mL/min/1.73m² for ≥3 months
Common Clinical Scenarios
- CKD monitoring in diabetes or hypertension
- Nephrology referral for moderate CKD
- Medication dose adjustments for renal function
- CKD stage 3a (eGFR 45-59) or 3b (eGFR 30-44)
Documentation Requirements
- Document eGFR value and staging
- Record underlying cause (diabetic, hypertensive, polycystic)
- Note proteinuria/albuminuria if present
- Document medication adjustments for renal function
Coding Guidelines
Inclusion Terms
These terms are included in this code:
CKD stage 3Moderate chronic kidney diseaseChronic renal insufficiency
Exclusion Terms
Do NOT use this code for:
- CKD stage 1-2 (N18.1-N18.2)
- CKD stage 4-5 (N18.4-N18.5)
- Acute kidney injury (N17.-)
Coding Notes
Stage based on eGFR: Stage 3 = 30-59 mL/min
Code underlying cause (diabetic nephropathy E11.22)
Use additional codes for complications (anemia, bone disease)
Related ICD-10 Codes
Consider these related codes based on patient presentation:
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Code
N18.3
Category
Diseases of the genitourinary system
Billable Status
Billable
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