N03.5 Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
The ICD-10-CM code for Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis is N03.5 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- N00-N08: Glomerular diseases (N00-N08)
- Category N03
- 12 codes (11 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to N03.5:
- Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › chronic › with › diffuse › mesangiocapillary glomerulonephritis
Inclusion Terms
- Chronic nephritic syndrome with membranoproliferative glomerulonephritis, types 1 and 3, or NOS
U.S. Hospital Utilization
N03.5 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
CKD staging and code assignment (N18.-)The ICD-10-CM classifies CKD based on severity. The severity of CKD is designated by stages 1-5. Stage 2, code N18.2, equates to mild CKD; stage 3, codes N18.30-N18.32, equate to moderate CKD; and stage 4, code N18.4, equates to severe CKD. Code N18.6, End stage renal disease (ESRD), is assigned when the provider has documented end- stage renal disease (ESRD).
CKD stage plus ESRD: assign N18.6 onlyIf both a stage of CKD and ESRD are documented, assign code N18.6 only.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026