ICD10BillableValid for clinical use
ICD-10 Code N03.5: Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).
When is it used?
- May be used when a clinician documents chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
14Diseases of the genitourinary system (N00-N99)
block
N00-N08Glomerular diseases
category
N03Chronic nephritic syndrome
currentN03
Official coding notes
Inclusion terms
- Chronic nephritic syndrome with membranoproliferative glomerulonephritis, types 1 and 3, or NOS
Excludes1 (do not code together)
- Chronic nephritic syndrome with C3 glomerulonephritis (N03.A)
- Chronic nephritic syndrome with C3 glomerulopathy (N03.A)
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
UrologistGynecologist
Related codes
N03.0Chronic nephritic syndrome with minor glomerular abnormalitycodeN03.1Chronic nephritic syndrome with focal and segmental glomerular lesionscodeN03.2Chronic nephritic syndrome with diffuse membranous glomerulonephritiscodeN03.3Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritiscodeN03.4Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritiscodeN03.6Chronic nephritic syndrome with dense deposit diseasecodeN03.7Chronic nephritic syndrome with diffuse crescentic glomerulonephritiscodeN03.8Chronic nephritic syndrome with other morphologic changescodeN03.9Chronic nephritic syndrome with unspecified morphologic changescodeN03.AChronic nephritic syndrome with C3 glomerulonephritiscode
Sibling codes
N03.0Chronic nephritic syndrome with minor glomerular abnormalitybillableN03.1Chronic nephritic syndrome with focal and segmental glomerular lesionsbillableN03.2Chronic nephritic syndrome with diffuse membranous glomerulonephritisbillableN03.3Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritisbillableN03.4Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisbillableN03.6Chronic nephritic syndrome with dense deposit diseasebillableN03.7Chronic nephritic syndrome with diffuse crescentic glomerulonephritisbillableN03.8Chronic nephritic syndrome with other morphologic changesbillableN03.9Chronic nephritic syndrome with unspecified morphologic changesbillableN03.AChronic nephritic syndrome with C3 glomerulonephritisbillable
Coverage-related procedures and services
HCPCS J9312high
INJECTION, RITUXIMAB, 10 MG
Source: CMS coverage guidance
HCPCS Q5115high
INJECTION, RITUXIMAB-ABBS, BIOSIMILAR, (TRUXIMA), 10 MG
Source: CMS coverage guidance
HCPCS Q5123high
INJECTION, RITUXIMAB-ARRX, BIOSIMILAR, (RIABNI), 10 MG
Source: CMS coverage guidance
HCPCS Q5119high
INJECTION, RITUXIMAB-PVVR, BIOSIMILAR, (RUXIENCE), 10 MG
Source: CMS coverage guidance
CPT 76770high
ULTRASOUND, RETROPERITONEAL (EG, RENAL, AORTA, NODES), REAL TIME WITH IMAGE DOCUMENTATION; COMPLETE
Source: CMS coverage guidance
CPT 76775high
ULTRASOUND, RETROPERITONEAL (EG, RENAL, AORTA, NODES), REAL TIME WITH IMAGE DOCUMENTATION; LIMITED
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 1336119008high
C4 (complement component 4) glomerulopathy
Source: SNOMED International ICD-10 map
SNOMED_CT 368901000119106high
Chronic nephritic syndrome due to membranoproliferative glomerulonephritis type III
Source: SNOMED International ICD-10 map
SNOMED_CT 78771000119105high
Chronic nephritic syndrome due to membranoproliferative glomerulonephritis, type 1
Source: SNOMED International ICD-10 map
SNOMED_CT 197713003high
Chronic nephritic syndrome, diffuse mesangiocapillary glomerulonephritis
Source: SNOMED International ICD-10 map
SNOMED_CT 1336121003high
Complement component 4 glomerulonephritis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
N03.5
Common synonyms
Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.