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ICD-10-CM 2027 diagnosis code

N06.AIsolated proteinuria with C3 glomerulonephritis

✓ Billable / specificCC — complication/comorbidity

N06.A is a valid, billable ICD-10-CM code for isolated proteinuria with c3 glomerulonephritis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N06.A

N06.A is the ICD-10-CM diagnosis code for isolated proteinuria with C3 glomerulonephritis. It belongs to category N06 (isolated proteinuria with specified morphological lesion), block N00-N08 (glomerular diseases) and chapter 14 (diseases of the genitourinary system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within N06 (isolated proteinuria with specified morphological lesion), N06.A is specifically for isolated proteinuria with C3 glomerulonephritis. Related codes cover minor glomerular abnormality (N06.0), focal and segmental glomerular lesions (N06.1), diffuse membranous glomerulonephritis (N06.2), diffuse mesangial proliferative glomerulonephritis (N06.3), diffuse endocapillary proliferative glomerulonephritis (N06.4), diffuse mesangiocapillary glomerulonephritis (N06.5), dense deposit disease (N06.6), diffuse crescentic glomerulonephritis (N06.7) and 2 more.

Don't report N06.A together with the conditions in its Excludes1 note: Isolated proteinuria (with C3 glomerulopathy) with dense deposit disease (N06.6).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC, relative weight 1.6398), DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC, relative weight 1.0003) and DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2021, effective October 1, 2020.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Isolated proteinuria with C3 glomerulopathy
Excludes1Not coded here — never report together with this code
  • Isolated proteinuria (with C3 glomerulopathy) with dense deposit disease (N06.6)

Notes that apply from higher levels

Instructions written at a parent level also apply to N06.A.

› From N06 Isolated proteinuria with specified morphological lesion
Excludes1
  • Proteinuria not associated with specific morphologic lesions (R80.0)

Broader instructions also apply from N00-N08 Glomerular diseases and Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to N06.A.

Codes whose notes reference N06.A

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2021 (effective 10/1/2020): Added
  • No changes since FY2021.

Common questions about N06.A

Is N06.A billable?

Yes. N06.A is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can N06.A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict N06.A as a principal diagnosis.

Is N06.A a CC or MCC?

N06.A is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does N06.A group to?

N06.A is used in the MS-DRG v44.0 logic for MS-DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC), MS-DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC) and MS-DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.