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ICD-10-CM 2027 diagnosis code

N05.4Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis

✓ Billable / specificCC — complication/comorbidity

N05.4 is a valid, billable ICD-10-CM code for unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Unsp neph syndrome w diffuse endocaplry prolif glomrlneph

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N05.4

N05.4 is the ICD-10-CM diagnosis code for unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis. It belongs to category N05 (unspecified nephritic syndrome), 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 N05 (unspecified nephritic syndrome), N05.4 is specifically for unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis. Related codes cover with minor glomerular abnormality (N05.0), with focal and segmental glomerular lesions (N05.1), with diffuse membranous glomerulonephritis (N05.2), with diffuse mesangial proliferative glomerulonephritis (N05.3), with diffuse mesangiocapillary glomerulonephritis (N05.5), with dense deposit disease (N05.6), with diffuse crescentic glomerulonephritis (N05.7), with other morphologic changes (N05.8) and 2 more.

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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 583.2 (nephritis and nephropathy, not specified as acute or chronic, with lesion of membranoproliferative glomerulonephritis).

Notes that apply from higher levels

Instructions written at a parent level also apply to N05.4.

› From N05 Unspecified nephritic syndrome
Includes
  • glomerular disease NOS
  • glomerulonephritis NOS
  • nephritis NOS
  • nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8
Excludes1
  • nephropathy NOS with no stated morphological lesion (N28.9)
  • renal disease NOS with no stated morphological lesion (N28.9)
  • tubulo-interstitial nephritis NOS (N12)

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

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to N05.4.

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.

ICD-9-CM equivalent

Converter →
  • 583.2Nephritis and nephropathy, not specified as acute or chronic, with lesion of membranoproliferative glomerulonephritisapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about N05.4

Is N05.4 billable?

Yes. N05.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can N05.4 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict N05.4 as a principal diagnosis.

Is N05.4 a CC or MCC?

N05.4 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does N05.4 group to?

N05.4 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.

What is the ICD-9 code for N05.4?

The CMS General Equivalence Mappings map N05.4 to ICD-9-CM 583.2.