ICD-10 N05.1
Billable / SpecificUnspecified nephritic syndrome with focal and segmental glomerular lesions
About ICD-10-CM N05.1
ICD-10-CM code N05.1 represents Unspecified nephritic syndrome with focal and segmental glomerular lesions. This is a billable/specific code in the Genitourinary System chapter (block N05). The 2026 edition of ICD-10-CM N05.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under N05.1. Per CMS ICD-10-CM Tabular 2026.
- Unspecified nephritic syndrome with focal and segmental hyalinosis
- Unspecified nephritic syndrome with focal and segmental sclerosis
- Unspecified nephritic syndrome with focal glomerulonephritis
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for N05.1
Local Coverage Determinations (LCDs) from CMS MACs that list N05.1 as a covered diagnosis.
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Commercial Payer Coverage
Coverage policies from major commercial payers referencing N05.1.
1 Medicare
CPT Codes Commonly Billed with N05.1
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert N05.1 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| N05.1 | 58389 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To N05.1
Other codes in section N00-N08 (Glomerular diseases).
ICD-10 N05.1, Billing FAQ
Is ICD-10 code N05.1 billable? +
Yes, N05.1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to N05.1? +
ICD-10 N05.1 includes: Unspecified nephritic syndrome with focal and segmental hyalinosis; Unspecified nephritic syndrome with focal and segmental sclerosis; Unspecified nephritic syndrome with focal glomerulonephritis.
What ICD-9 codes does N05.1 map to? +
Per CMS GEMs, N05.1 maps to ICD-9 codes: 58389. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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