N00.9 Acute nephritic syndrome with unspecified morphologic changes

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

Applies from N00 Acute nephritic syndrome

Includes

• acute glomerular disease
• acute glomerulonephritis
• acute nephritis

Excludes1 (never code together)

• acute tubulo-interstitial nephritis (N10)
• nephritic syndrome NOS (N05.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 580.9 Acute glomerulonephritis with unspecified pathological lesion in kidney (approximate)

Diagnosis Index entries for N00.9

• Glomerulonephritis › acute
• Glomerulonephritis › poststreptococcal NEC › acute
• Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › acute
• Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › croupous
• Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › poststreptococcal › acute
• Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › war
• Syndrome › nephritic › acute

Nearby codes

• N00.4 Acute nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
• N00.5 Acute nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
• N00.6 Acute nephritic syndrome with dense deposit disease
• N00.7 Acute nephritic syndrome with diffuse crescentic glomerulonephritis
• N00.8 Acute nephritic syndrome with other morphologic changes
• N00.9 Acute nephritic syndrome with unspecified morphologic changes (this code)
• N00.A Acute nephritic syndrome with C3 glomerulonephritis
• N00.B Acute nephritic syndrome with immune complex membranoproliferative glomerulonephritis
• N00.B1 Acute nephritic syndrome with idiopathic immune membranoproliferative glomerulonephritis (IC-MPGN)
• N00.B2 Acute nephritic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)