ICD10BillableValid for clinical use

ICD-10 Code N01.9: Rapidly progressive nephritic syndrome with unspecified morphologic changes

N01.9 is a billable ICD-10 diagnosis code used to classify Rapidly progressive nephritic syndrome with unspecified morphologic changes in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).

When is it used?

  • May be used when a clinician documents rapidly progressive nephritic syndrome with unspecified morphologic changes in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
14Diseases of the genitourinary system (N00-N99)
block
N00-N08Glomerular diseases
category
N01Rapidly progressive nephritic syndrome
currentN01

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

UrologistGynecologist

Related codes

N01.0Rapidly progressive nephritic syndrome with minor glomerular abnormalitycodeN01.1Rapidly progressive nephritic syndrome with focal and segmental glomerular lesionscodeN01.2Rapidly progressive nephritic syndrome with diffuse membranous glomerulonephritiscodeN01.3Rapidly progressive nephritic syndrome with diffuse mesangial proliferative glomerulonephritiscodeN01.4Rapidly progressive nephritic syndrome with diffuse endocapillary proliferative glomerulonephritiscodeN01.5Rapidly progressive nephritic syndrome with diffuse mesangiocapillary glomerulonephritiscodeN01.6Rapidly progressive nephritic syndrome with dense deposit diseasecodeN01.7Rapidly progressive nephritic syndrome with diffuse crescentic glomerulonephritiscodeN01.8Rapidly progressive nephritic syndrome with other morphologic changescodeN01.ARapidly progressive nephritic syndrome with C3 glomerulonephritiscode

Sibling codes

N01.0Rapidly progressive nephritic syndrome with minor glomerular abnormalitybillableN01.1Rapidly progressive nephritic syndrome with focal and segmental glomerular lesionsbillableN01.2Rapidly progressive nephritic syndrome with diffuse membranous glomerulonephritisbillableN01.3Rapidly progressive nephritic syndrome with diffuse mesangial proliferative glomerulonephritisbillableN01.4Rapidly progressive nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisbillableN01.5Rapidly progressive nephritic syndrome with diffuse mesangiocapillary glomerulonephritisbillableN01.6Rapidly progressive nephritic syndrome with dense deposit diseasebillableN01.7Rapidly progressive nephritic syndrome with diffuse crescentic glomerulonephritisbillableN01.8Rapidly progressive nephritic syndrome with other morphologic changesbillableN01.ARapidly progressive nephritic syndrome with C3 glomerulonephritisbillable

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
N01.9

Common synonyms

Rapidly progressive nephritic syndrome with unspecified morphologic changesRapidly progressive nephritic syndrome with morphologic changes

Frequently asked questions

Code details

CodeN01.9
SystemICD10
Display nameRapidly progressive nephritic syndrome with unspecified morphologic changes
ChapterDiseases of the genitourinary system (N00-N99)
BlockGlomerular diseases

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Disease, diseasedDisease, diseasedDisease, diseasedGlomerulonephritisGlomerulonephritisGlomerulonephritisNephritis, nephritic(albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)Nephritis, nephritic(albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)Nephritis, nephritic(albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)Syndrome

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code N01.9 for Rapidly progressive nephritic syndrome with unspecified morphologic changes | HealthAssure