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N01.9

✓ Billable

Rapidly progressive nephritic syndrome with unspecified morphologic changes

Diseases of the genitourinary system (N00-N99)

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❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

N01
  • • nephritic syndrome NOS (N05.-)

Clinical Description

ICD-10-CM code N01.9 represents rapidly progressive nephritic syndrome with unspecified morphologic changes. This code falls under the Diseases of the genitourinary system (N00-N99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that N01.9 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code N01.9?

ICD-10-CM code N01.9 is "Rapidly progressive nephritic syndrome with unspecified morphologic changes". It belongs to the category: Diseases of the genitourinary system (N00-N99).

Is N01.9 a billable ICD-10 code?

Yes, N01.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with N01.9?

N01.9 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Related Codes in N01

Other codes in the same category that may be relevant for differential coding:

N01.0Rapidly progressive nephritic syndrome with minor glomerular abnormalityN01.1Rapidly progressive nephritic syndrome with focal and segmental glomerular lesionsN01.2Rapidly progressive nephritic syndrome with diffuse membranous glomerulonephritisN01.3Rapidly progressive nephritic syndrome with diffuse mesangial proliferative glomerulonephritisN01.4Rapidly progressive nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisN01.5Rapidly progressive nephritic syndrome with diffuse mesangiocapillary glomerulonephritisN01.6Rapidly progressive nephritic syndrome with dense deposit diseaseN01.7Rapidly progressive nephritic syndrome with diffuse crescentic glomerulonephritisN01.8Rapidly progressive nephritic syndrome with other morphologic changesN01.ARapidly progressive nephritic syndrome with C3 glomerulonephritis

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Code Information

CodeN01.9
BillableYes
ParentN01
CategoryDiseases of the genitourinary system (N00-N99)
Excludes11 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)