ICD-10-CM 2027
ICD-10 code for membranous diffuse nephropathy
Isolated proteinuria with diffuse membranous glomerulonephritis, unspecified
From the official ICD-10-CM alphabetic index entry “Nephropathy › membranous (diffuse)”. Page updated September 29, 2026.
About coding membranous diffuse nephropathy
The ICD-10-CM code for membranous diffuse nephropathy is N06.20 (Isolated proteinuria with diffuse membranous glomerulonephritis, unspecified). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N06.20.
Within N06.2, choose N06.20 (unspecified) only when documentation doesn't support a more specific option: primary membranous nephropathy with isolated proteinuria (N06.21), secondary membranous nephropathy with isolated proteinuria (N06.22) and other isolated proteinuria with diffuse membranous glomerulonephritis (N06.29).
Don't report N06.20 together with the conditions in its Excludes1 note: membranous nephropathy NOS with nephrotic syndrome (N04.20).
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.
More specific membranous diffuse nephropathy codes (official index)
- with
- nephrotic syndrome N04.20 — Nephrotic syndrome with diffuse membranous glomerulonephritis, unspecified
- primary N04.21 — Primary membranous nephropathy with nephrotic syndrome
- secondary N04.22 — Secondary membranous nephropathy with nephrotic syndrome
- idiopathic, with nephrotic syndrome N04.21 — Primary membranous nephropathy with nephrotic syndrome
- primary N06.21 — Primary membranous nephropathy with isolated proteinuria
- with nephrotic syndrome N04.21 — Primary membranous nephropathy with nephrotic syndrome
- secondary N06.22 — Secondary membranous nephropathy with isolated proteinuria
- with nephrotic syndrome N04.22 — Secondary membranous nephropathy with nephrotic syndrome
Don't confuse with (Excludes1 for N06.20)
- membranous nephropathy NOS with nephrotic syndrome (N04.20)
Common questions about membranous diffuse nephropathy ICD-10 codes
What is the ICD-10 code for membranous diffuse nephropathy?
- N06.20 — Isolated proteinuria with diffuse membranous glomerulonephritis, unspecified. More specific codes apply when the documentation supports them: N04.20, N04.21, N04.22, N04.21 and others below.
What is the ICD-10 code for primary membranous diffuse nephropathy?
- N06.21 — Primary membranous nephropathy with isolated proteinuria.
What is the ICD-10 code for secondary membranous diffuse nephropathy?
- N06.22 — Secondary membranous nephropathy with isolated proteinuria.
Is N06.20 billable?
- Yes. N06.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N06.20 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N06.20 as a principal diagnosis.
Is N06.20 a CC or MCC?
- N06.20 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.