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ICD-10-CM 2027

ICD-10 code for IgA nephropathy

N02.B

Recurrent and persistent immunoglobulin A nephropathy

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Nephropathy › IgA”. Page updated September 29, 2026.

About coding IgA nephropathy

The ICD-10-CM code for IgA nephropathy is N02.B (Recurrent and persistent immunoglobulin A nephropathy). The official index lists 9 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N02.B.

Within N02 (recurrent and persistent hematuria), N02.B is specifically for recurrent and persistent immunoglobulin A nephropathy. Related codes cover with minor glomerular abnormality (N02.0), with focal and segmental glomerular lesions (N02.1), with diffuse membranous glomerulonephritis (N02.2), with diffuse mesangial proliferative glomerulonephritis (N02.3), with diffuse endocapillary proliferative glomerulonephritis (N02.4), with diffuse mesangiocapillary glomerulonephritis (N02.5), with dense deposit disease (N02.6), with diffuse crescentic glomerulonephritis (N02.7) and 3 more.

To report this condition, pick the subcode that matches the documentation: N02.B1 (with glomerular lesion), N02.B2 (with focal and segmental glomerular lesion), N02.B3 (with diffuse membranoproliferative glomerulonephritis), N02.B4 (with diffuse membranous glomerulonephritis), N02.B5 (with diffuse mesangial proliferative glomerulonephritis), N02.B6 (with diffuse mesangiocapillary glomerulonephritis) and N02.B9 (nephropathy).

It was added in FY2024, effective October 1, 2023.

More specific IgA nephropathy codes (official index)

  • with
  • focal and segmental hyalinosis or sclerosis N02.B2 — Recurrent and persistent immunoglobulin A nephropathy with focal and segmental glomerular lesion
  • glomerular lesion N02.B1 — Recurrent and persistent immunoglobulin A nephropathy with glomerular lesion
  • focal and segmental N02.B2 — Recurrent and persistent immunoglobulin A nephropathy with focal and segmental glomerular lesion
  • glomerulonephritis
  • membranoproliferative (diffuse) N02.B3 — Recurrent and persistent immunoglobulin A nephropathy with diffuse membranoproliferative glomerulonephritis
  • membranous (diffuse) N02.B4 — Recurrent and persistent immunoglobulin A nephropathy with diffuse membranous glomerulonephritis
  • mesangial proliferative (diffuse) N02.B5 — Recurrent and persistent immunoglobulin A nephropathy with diffuse mesangial proliferative glomerulonephritis
  • mesangiocapillary (diffuse) N02.B6 — Recurrent and persistent immunoglobulin A nephropathy with diffuse mesangiocapillary glomerulonephritis
  • proliferative NEC N02.B9 — Other recurrent and persistent immunoglobulin A nephropathy
  • specified pathology NEC N02.B9 — Other recurrent and persistent immunoglobulin A nephropathy

Common questions about IgA nephropathy ICD-10 codes

What is the ICD-10 code for IgA nephropathy?

N02.B — Recurrent and persistent immunoglobulin A nephropathy (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: N02.B2, N02.B1, N02.B2, N02.B3 and others below.

What is the ICD-10 code for proliferative nec iga nephropathy?

N02.B9 — Other recurrent and persistent immunoglobulin A nephropathy.

Is N02.B billable?

No. N02.B is a header code. Report one of its more specific subcodes instead.