MCMedicalCodingSoftware
N00.9

N00.9: Acute nephritic syndrome with unspecified morphologic changes

Billable / specific codeICD-10-CM

N00.9 is a billable, specific ICD-10-CM code for acute nephritic syndrome with unspecified morphologic changes. It is valid for submission on a claim.

Check N00.9 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above N00.9

A category’s note binds every code beneath it.

Written on N00: Acute nephritic syndrome

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

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

N00.9 is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A55336Billing and Coding: Retroperitoneal Ultrasound

Alphabetic index entries that lead here

  • Glomerulonephritis›acute
  • Nephritis, nephritic›acute
  • Nephritis, nephritic›croupous
  • Nephritis, nephritic›war
  • Glomerulonephritis›poststreptococcal NEC›acute
  • Nephritis, nephritic›poststreptococcal›acute
  • Syndrome›nephritic›acute

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under N00

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.