ICD-10 N08
Billable / SpecificGlomerular disorders in diseases classified elsewhere
About ICD-10-CM N08
ICD-10-CM code N08 represents Glomerular disorders in diseases classified elsewhere. This is a billable/specific code in the Genitourinary System chapter (block N08). The 2026 edition of ICD-10-CM N08 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under N08. Per CMS ICD-10-CM Tabular 2026.
- Glomerulonephritis
- Nephritis
- Nephropathy
Type 1 Excludes
Pure excludes, these codes can never be coded together with N08. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- glomerulonephritis, nephritis and nephropathy (in):
- antiglomerular basement membrane disease (M31.0)
- diabetes (E08-E13 with .21)
- gonococcal (A54.21)
- Goodpasture's syndrome (M31.0)
- hemolytic-uremic syndrome (D59.3-)
- lupus (M32.14)
- mumps (B26.83)
- syphilis (A52.75)
- systemic lupus erythematosus (M32.14)
- Wegener's granulomatosis (M31.31)
- pyelonephritis in diseases classified elsewhere (N16)
- renal tubulo-interstitial disorders classified elsewhere (N16)
Coding Notes
Code First
- underlying disease, such as:
- amyloidosis (E85.-)
- congenital syphilis (A50.5)
- cryoglobulinemia (D89.1)
- disseminated intravascular coagulation (D65)
- gout (M1A.-, M10.-)
- microscopic polyangiitis (M31.7)
- multiple myeloma (C90.0-)
- sepsis (A40.0-A41.9)
- sickle-cell disease (D57.0-D57.8)
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 N08
Local Coverage Determinations (LCDs) from CMS MACs that list N08 as a covered diagnosis.
Showing top 10 of 17 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing N08.
4 Medicare
CPT Codes Commonly Billed with N08
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 N08 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 |
|---|---|---|
| N08 | 58381 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To N08
Other codes in section N00-N08 (Glomerular diseases).
ICD-10 N08, Billing FAQ
Is ICD-10 code N08 billable? +
Yes, N08 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 N08? +
ICD-10 N08 includes: Glomerulonephritis; Nephritis; Nephropathy.
What codes are Type 1 Excludes for N08? +
Type 1 Excludes (never code together with N08): glomerulonephritis, nephritis and nephropathy (in):; antiglomerular basement membrane disease (M31.0); diabetes (E08-E13 with .21)
What ICD-9 codes does N08 map to? +
Per CMS GEMs, N08 maps to ICD-9 codes: 58381. 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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