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N05.A

N05.A: Unspecified nephritic syndrome with C3 glomerulonephritis

Billable / specific codeICD-10-CM

N05.A is a billable, specific ICD-10-CM code for unspecified nephritic syndrome with c3 glomerulonephritis. It is valid for submission on a claim.

Check N05.A with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • Unspecified nephritic syndrome (with C3 glomerulopathy) with dense deposit disease (N05.6)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Unspecified nephritic syndrome with C3 glomerulopathy

Excludes1 inherited from the categories above N05.A

A category’s note binds every code beneath it.

Written on N05: Unspecified nephritic syndrome

  • nephropathy NOS with no stated morphological lesion (N28.9)
  • renal disease NOS with no stated morphological lesion (N28.9)
  • tubulo-interstitial nephritis NOS (N12)

Other codes that can never be billed with N05.A

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • N00Acute nephritic syndrome
  • N01Rapidly progressive nephritic syndrome
  • N03Chronic nephritic syndrome
  • N05.5Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
  • N28.9Disorder of kidney and ureter, unspecified

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Glomerulonephritis›with›C3›glomerulonephritis
  • Glomerulonephritis›with›C3›glomerulopathy
  • Nephritis, nephritic›with›C3›glomerulonephritis
  • Nephritis, nephritic›with›C3›glomerulopathy

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under N05

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.