N18.4
Chronic kidney disease, stage 4 (severe)
Diseases of the genitourinary system Billable
Quick Reference
eGFR 15-29 mL/min/1.73m² for ≥3 months
Clinical Information
When to Use This Code
eGFR 15-29 mL/min/1.73m² for ≥3 months
Common Clinical Scenarios
- Advanced CKD management
- Nephrology referral for dialysis planning
- Pre-dialysis education
- Renal replacement therapy evaluation
Documentation Requirements
- Document eGFR value (15-29 range)
- Record underlying cause (diabetic, hypertensive, GN)
- Note complications (anemia, bone disease, acidosis)
- Specify if dialysis or transplant being considered
Coding Guidelines
Inclusion Terms
These terms are included in this code:
CKD stage 4Severe chronic kidney diseasePre-dialysis CKD
Exclusion Terms
Do NOT use this code for:
- CKD stage 3 (N18.3)
- CKD stage 5/ESRD (N18.5, N18.6)
- Acute kidney injury (N17.-)
Coding Notes
Stage based on eGFR: 15-29 mL/min
High risk for dialysis within 1-2 years
Dialysis access planning critical
Related ICD-10 Codes
Consider these related codes based on patient presentation:
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Code
N18.4
Category
Diseases of the genitourinary system
Billable Status
Billable
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