Lupus Nephritis ICD-10 Code: M32.14
Last updated: January 31, 2025
The ICD-10 code for lupus nephritis is M32.14 (Glomerular disease in systemic lupus erythematosus). Add a secondary code for CKD stage (N18.x) if chronic kidney disease is documented.
Primary Code Details
| Code | Description | Billable |
|---|---|---|
| M32.14 | Glomerular disease in systemic lupus erythematosus | Yes |
Related Codes
Documentation Requirements
- Document ISN/RPS class if biopsy performed (Class I-VI)
- Note activity and chronicity indices if available
- Document CKD stage based on eGFR
- Note proteinuria levels and complement levels
Common Coding Scenarios
Documentation:
"SLE with Class IV lupus nephritis per renal biopsy. eGFR 45 (CKD stage 3b)."
Code:
M32.14, N18.3 - Lupus nephritis + CKD stage 3
Rationale:
Code M32.14 for the lupus nephritis plus N18.3 for the CKD stage. ISN/RPS class is clinical detail but doesn't change the code.
Documentation:
"SLE patient with persistent proteinuria suggestive of lupus nephritis. Renal biopsy pending."
Code:
M32.14 - Glomerular disease in systemic lupus erythematosus
Rationale:
M32.14 can be used based on clinical diagnosis even without biopsy confirmation.
Frequently Asked Questions
M32.14 (Glomerular disease in systemic lupus erythematosus) is the specific code for lupus nephritis. Add N18.x to identify CKD stage if applicable.
Yes. If CKD is documented with a specific stage, code both M32.14 for the lupus nephritis and the appropriate N18.x code for the CKD stage.
The ISN/RPS lupus nephritis class (I-VI) is clinical detail that should be documented in the record but does not change the ICD-10 code. Use M32.14 regardless of class.
Related Resources
Last updated: January 2025. Code data reflects ICD-10-CM 2026 version. This guide is for educational purposes only. Always verify codes against current official guidelines.