N05.3 Unspecified 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 N05 Unspecified nephritic syndrome

Includes

• glomerular disease NOS
• glomerulonephritis NOS
• nephritis NOS
• nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8

Excludes1 (never code together)

• nephropathy NOS with no stated morphological lesion (N28.9)
• renal disease NOS with no stated morphological lesion (N28.9)
• tubulo-interstitial nephritis NOS (N12)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 583.2 Nephritis and nephropathy, not specified as acute or chronic, with lesion of membranoproliferative glomerulonephritis (approximate)

Code annotations containing back-references to N05.3

Back-references to N05

• Type 1 Excludes: N00 Acute nephritic syndrome ("nephritic syndrome NOS (N05.-)")
• Type 1 Excludes: N01 Rapidly progressive nephritic syndrome ("nephritic syndrome NOS (N05.-)")
• Type 1 Excludes: N03 Chronic nephritic syndrome ("nephritic syndrome NOS (N05.-)")
• Type 1 Excludes: N28.9 Disorder of kidney and ureter, unspecified ("unspecified nephritic syndrome (N05.-)")

Diagnosis Index entries for N05.3

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

Nearby codes

• N05 Unspecified nephritic syndrome
• N05.0 Unspecified nephritic syndrome with minor glomerular abnormality
• N05.1 Unspecified nephritic syndrome with focal and segmental glomerular lesions
• N05.2 Unspecified nephritic syndrome with diffuse membranous glomerulonephritis
• N05.3 Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritis (this code)
• N05.4 Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
• N05.5 Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
• N05.6 Unspecified nephritic syndrome with dense deposit disease
• N05.7 Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis
• N05.8 Unspecified nephritic syndrome with other morphologic changes