N03.3 Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from N03 Chronic nephritic syndrome

Includes

• chronic glomerular disease
• chronic glomerulonephritis
• chronic nephritis

Excludes1 (never code together)

• chronic tubulo-interstitial nephritis (N11.-)
• diffuse sclerosing glomerulonephritis (N05.8-)
• nephritic syndrome NOS (N05.-)

MS-DRG index

Defines the logic of DRG(s) 698-700 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 582.1 Chronic glomerulonephritis with lesion of membranous glomerulonephritis (approximate)

Diagnosis Index entries for N03.3

• Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › chronic › with › diffuse › mesangial proliferative glomerulonephritis

Nearby codes

• N03 Chronic nephritic syndrome
• N03.0 Chronic nephritic syndrome with minor glomerular abnormality
• N03.1 Chronic nephritic syndrome with focal and segmental glomerular lesions
• N03.2 Chronic nephritic syndrome with diffuse membranous glomerulonephritis
• N03.3 Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis (this code)
• N03.4 Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
• N03.5 Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
• N03.6 Chronic nephritic syndrome with dense deposit disease
• N03.7 Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
• N03.8 Chronic nephritic syndrome with other morphologic changes