N03
⚠ Non-billable
Chronic nephritic syndrome
ICD-10-CM · FY2026 · Diseases of the Genitourinary System
Code
N03
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Genitourinary System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code N03?
ICD-10-CM code N03 represents Chronic nephritic syndrome. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Genitourinary System chapter, effective October 1, 2025 – September 30, 2026.
Is N03 billable?
No. N03 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is N03 in?
N03 belongs to the Diseases of the Genitourinary System chapter (N00–N99) of ICD-10-CM.
Related codes in the N03 category
N03.0
Chronic nephritic syndrome with minor glomerular abnormality
Billable
N03.1
Chronic nephritic syndrome with focal and segmental glomerular lesions
Billable
N03.2
Chronic nephritic syndrome with diffuse membranous glomerulonephritis
Billable
N03.3
Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
Billable
N03.4
Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
Billable
N03.5
Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
Billable
N03.6
Chronic nephritic syndrome with dense deposit disease
Billable
N03.7
Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
Billable
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