ICD-10-CM 2027
ICD-10 code for glomerulonephritis
From the official ICD-10-CM alphabetic index entry “Glomerulonephritis”. Page updated September 29, 2026.
About coding glomerulonephritis
The ICD-10-CM code for glomerulonephritis is N05.9 (Unspecified nephritic syndrome with unspecified morphologic changes). The official index lists 60 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N05.9.
Within N05, choose N05.9 (with unspecified morphologic changes) only when documentation doesn't support a more specific option: 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 endocapillary proliferative glomerulonephritis (N05.4), with diffuse mesangiocapillary glomerulonephritis (N05.5), with dense deposit disease (N05.6), with diffuse crescentic glomerulonephritis (N05.7) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
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.
More specific glomerulonephritis codes (official index)
- with
- C3
- glomerulonephritis N05.A — Unspecified nephritic syndrome with C3 glomerulonephritis
- glomerulopathy N05.A — Unspecified nephritic syndrome with C3 glomerulonephritis
- with dense deposit disease N05.6 — Unspecified nephritic syndrome with dense deposit disease
- edema
- minimal change N05.0 — Unspecified nephritic syndrome with minor glomerular abnormality
- minor glomerular abnormality N05.0 — Unspecified nephritic syndrome with minor glomerular abnormality
- acute N00.9 — Acute nephritic syndrome with unspecified morphologic changes
- chronic N03.9 — Chronic nephritic syndrome with unspecified morphologic changes
- crescentic (diffuse) NEC N05.7 — Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis
- dense deposit N05.6 — Unspecified nephritic syndrome with dense deposit disease
- diffuse
- crescentic N05.7 — Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis
- endocapillary proliferative N05.4 — Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
- membranous N05.2 — Unspecified nephritic syndrome with diffuse membranous glomerulonephritis
- mesangial proliferative N05.3 — Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
- mesangiocapillary N05.5 — Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- sclerosing N18.9 — Chronic kidney disease, unspecified
- endocapillary proliferative (diffuse) NEC N05.4 — Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
- extracapillary NEC N05.7 — Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis
- focal (and segmental) N05.1 — Unspecified nephritic syndrome with focal and segmental glomerular lesions
- hypocomplementemic
- IgA
- immune complex (circulating) NEC N05.8 — Unspecified nephritic syndrome with other morphologic changes
- in (due to)
- amyloidosis E85.4 — Organ-limited amyloidosis
- bilharziasis B65.9 — Schistosomiasis, unspecified
- cryoglobulinemia D89.1 — Cryoglobulinemia
- defibrination syndrome D65 — Disseminated intravascular coagulation [defibrination syndrome]
- diabetes mellitus
- disseminated intravascular coagulation D65 — Disseminated intravascular coagulation [defibrination syndrome]
- Fabry (-Anderson) disease E75.21 — Fabry (-Anderson) disease
- Goodpasture's syndrome M31.0 — Hypersensitivity angiitis
- hemolytic-uremic syndrome
- Henoch (-Schönlein) purpura D69.0 — Allergic purpura
- lecithin cholesterol acyltransferase deficiency E78.6 — Lipoprotein deficiency
- microscopic polyangiitis M31.7 — Microscopic polyangiitis
- multiple myeloma C90.0 — Multiple myeloma
- Plasmodium malariae B52.0 — Plasmodium malariae malaria with nephropathy
- schistosomiasis B65.9 — Schistosomiasis, unspecified
- sepsis A41.9 — Sepsis, unspecified organism
- streptococcal A40 — Streptococcal sepsis
- sickle-cell disorders D57 — Sickle-cell disorders
- strongyloidiasis B78.9 — Strongyloidiasis, unspecified
- subacute bacterial endocarditis I33.0 — Acute and subacute infective endocarditis
- syphilis (late) congenital A50.59 — Other late congenital syphilis, symptomatic
- systemic lupus erythematosus M32.14 — Glomerular disease in systemic lupus erythematosus
- thrombotic thrombocytopenic purpura M31.19 — Other thrombotic microangiopathy
- typhoid fever A01.09 — Typhoid fever with other complications
- Waldenström macroglobulinemia C88.0 — Waldenstrom macroglobulinemia
- Wegener's granulomatosis M31.31 — Wegener's granulomatosis with renal involvement
- latent or quiescent N03.9 — Chronic nephritic syndrome with unspecified morphologic changes
- lobular, lobulonodular
- membranoproliferative (diffuse)(type 1 or 3) N05.5 — Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- dense deposit (type 2) NEC N05.6 — Unspecified nephritic syndrome with dense deposit disease
- membranous (diffuse) NEC N05.2 — Unspecified nephritic syndrome with diffuse membranous glomerulonephritis
- mesangial
- IgA/IgG
- proliferative (diffuse) NEC N05.3 — Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
- mesangiocapillary (diffuse) NEC N05.5 — Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- necrotic, necrotizing NEC N05.8 — Unspecified nephritic syndrome with other morphologic changes
- nodular
- poststreptococcal NEC N05.9 — Unspecified nephritic syndrome with unspecified morphologic changes
- acute N00.9 — Acute nephritic syndrome with unspecified morphologic changes
- chronic N03.9 — Chronic nephritic syndrome with unspecified morphologic changes
- rapidly progressive N01.9 — Rapidly progressive nephritic syndrome with unspecified morphologic changes
- proliferative NEC N05.8 — Unspecified nephritic syndrome with other morphologic changes
- diffuse (lupus) M32.14 — Glomerular disease in systemic lupus erythematosus
- rapidly progressive N01.9 — Rapidly progressive nephritic syndrome with unspecified morphologic changes
- sclerosing, diffuse N18.9 — Chronic kidney disease, unspecified
- specified pathology NEC N05.8 — Unspecified nephritic syndrome with other morphologic changes
- subacute N01.9 — Rapidly progressive nephritic syndrome with unspecified morphologic changes
Common questions about glomerulonephritis ICD-10 codes
What is the ICD-10 code for glomerulonephritis?
- N05.9 — Unspecified nephritic syndrome with unspecified morphologic changes. More specific codes apply when the documentation supports them: N05.A, N05.A, N05.6, N05.0 and others below.
What is the ICD-10 code for acute glomerulonephritis?
- N00.9 — Acute nephritic syndrome with unspecified morphologic changes.
What is the ICD-10 code for chronic glomerulonephritis?
- N03.9 — Chronic nephritic syndrome with unspecified morphologic changes.
What is the ICD-10 code for crescentic nec glomerulonephritis?
- N05.7 — Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis.
What is the ICD-10 code for dense deposit glomerulonephritis?
- N05.6 — Unspecified nephritic syndrome with dense deposit disease.
What is the ICD-10 code for endocapillary proliferative nec glomerulonephritis?
- N05.4 — Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis.
What is the ICD-10 code for extracapillary nec glomerulonephritis?
- N05.7 — Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis.
Is N05.9 billable?
- Yes. N05.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N05.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N05.9 as a principal diagnosis.
Is N05.9 a CC or MCC?
- No. N05.9 is neither a CC nor an MCC under MS-DRG v44.0.