2026 ICD-10-CM Diagnosis Code N06Isolated proteinuria with specified morphological lesion

ICD-10-CM Codes›N00–N99›N00-N08›N06

ICD-10-CM N06
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N06 is a non-billable ICD-10-CM category code for isolated proteinuria with specified morphological lesion, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N06.0, N06.1, N06.20, and N06.21.

Code Identity

ICD-10-CM Code
N06
Billable Status
No — Non-Billable Category
Code Describes
Isolated proteinuria with specified morphological lesion
Chapter
N00-N08
Glomerular diseases

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN00-N08Glomerular diseases
CategoryN06Isolated proteinuria with specified morphological lesion
This CodeN06Isolated proteinuria with specified morphological lesion

Specific Coding for Isolated proteinuria with specified morphological lesionOverview

Non-specific codes like N06 require more characters. Use one of these billable codes instead:

  • Use N06.0 for Isolated proteinuria with minor glomerular abnormality

  • Use N06.1 for Isolated proteinuria with focal and segmental glomerular lesions

  • N06.2 for Isolated proteinuria with diffuse membranous glomerulonephritis

  • Use N06.20 for Isolated proteinuria with diffuse membranous glomerulonephritis, unspecified

  • Use N06.21 for Primary membranous nephropathy with isolated proteinuria

  • Use N06.22 for Secondary membranous nephropathy with isolated proteinuria

  • Use N06.29 for Other isolated proteinuria with diffuse membranous glomerulonephritis

  • Use N06.3 for Isolated proteinuria with diffuse mesangial proliferative glomerulonephritis

  • Use N06.4 for Isolated proteinuria with diffuse endocapillary proliferative glomerulonephritis

  • Use N06.5 for Isolated proteinuria with diffuse mesangiocapillary glomerulonephritis

  • Use N06.6 for Isolated proteinuria with dense deposit disease

  • Use N06.7 for Isolated proteinuria with diffuse crescentic glomerulonephritis

  • Use N06.8 for Isolated proteinuria with other morphologic lesion

  • Use N06.9 for Isolated proteinuria with unspecified morphologic lesion

  • Use N06.A for Isolated proteinuria with C3 glomerulonephritis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • Proteinuria not associated with specific morphologic lesions R80.0

Patient EducationClinical

Kidney Diseases

You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters.

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N06Overview

Is N06 (Isolated proteinuria with specified morphological lesion) a billable code?

No. This is a category header that groups the codes for isolated proteinuria with specified morphological lesion, and headers cannot be submitted on claims. Claims for isolated proteinuria with specified morphological lesion need a more specific code from this category, such as N06.0, N06.1, and N06.20.