N08 ICD-10-CM Code: Glomerular disorders in diseases classified elsewhere

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for N08 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Notes without a marker are published on N08 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for N08

MedCoder structured workflow — derived from this code’s own official record

Before you code N08

1. N08 is a manifestation code (“in diseases classified elsewhere”). Confirm the underlying condition is documented and sequence it first; a manifestation code is not reported as the first-listed or principal diagnosis. The etiology/manifestation convention (Guidelines I.A.13).

   See the official tabular notes · Guide: Manifestation codes and Code First sequencing →

2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with N08. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

   See the official tabular notes

Choose the right path

1. Does the documentation support a condition named in N08’s Excludes1 note?
   Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
   No → Continue.

   ReviewM31.0, A54.21, D59.3, M32.14, B26.83, A52.75

2. Is the underlying (etiologic) condition the Code First note names documented?
   Yes → Sequence the underlying condition first, then N08.
   No → A manifestation code needs its underlying condition — query before reporting it.

   ReviewE85, A50.5, D89.1, D65, M1A, M10

Consider N08. Then review the Code Also note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

The underlying (etiologic) condition

Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).

Official instructions as workflow

• Excludes1 — check before selecting N08(14 notes)

  Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with N08: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

  CompareM31.0, A54.21, D59.3, M32.14, B26.83, A52.75

  See the official tabular notes · Guidelines I.A.12.a

• Code First — sequencing check(10 notes)

  Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before N08. Do not add an underlying condition the record does not document.

  ReviewE85, A50.5, D89.1, D65, M1A, M10

  See the official tabular notes · Guidelines I.A.13

• Code Also — related condition(1 note)

  Coding workflow: Review the related condition when both are documented and the instruction applies. A Code Also note does not fix sequencing; the order follows the circumstances of the encounter.

  See the official tabular notes · Guidelines I.A.17

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse N08 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of N08 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• M31.0— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of antiglomerular basement membrane disease moves the case to M31.0; the two are not reported together unless documented as unrelated.

  Full comparison: N08 vs M31.0 →

• E08— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of diabetes moves the case to E08; the two are not reported together unless documented as unrelated.

  Full comparison: N08 vs E08 →

• E13— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of diabetes moves the case to E13; the two are not reported together unless documented as unrelated.

  Full comparison: N08 vs E13 →

• A54.21— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of gonococcal moves the case to A54.21; the two are not reported together unless documented as unrelated.

  Full comparison: N08 vs A54.21 →

• D59.3— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of hemolytic-uremic syndrome moves the case to D59.3; the two are not reported together unless documented as unrelated.

  Full comparison: N08 vs D59.3 →

• M32.14— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of lupus moves the case to M32.14; the two are not reported together unless documented as unrelated.

  Full comparison: N08 vs M32.14 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

1. Sequencing: 10 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
2. 1 Code Also note — a second code may apply; the guidelines leave its sequencing to the circumstances of the encounter. See the Code Also notes
3. 14 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

• Principal-diagnosis restriction. This is a manifestation code: the Medicare Code Editor requires the underlying condition (etiology) to be sequenced first, with this code reported after it.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name N08 or its code family, from the CMS ICD-10-CM tabular instructional notes and the CMS ICD-10-CM Index to Diseases and Injuries. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Use Additional Code instructions: M10 — Gout, M1A — Chronic gout.

These codes instruct coders to additionally report this code when it applies.

Referenced by 8 Index etiology/manifestation pairs across 6 chapters: B65.9 — Schistosomiasis, unspecified, B78.9 — Strongyloidiasis, unspecified, C88.0 — Waldenström macroglobulinemia, D69.0 — Allergic purpura, E75.21 — Fabry (-Anderson) disease, E78.6 — Lipoprotein deficiency, I33.0 — Acute and subacute infective endocarditis, M31.19 — Other thrombotic microangiopathy.

The ICD-10-CM Index lists these etiology codes with this code in brackets — the manifestation, reported second.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 698 (MDC 11), DRG 699 (MDC 11), DRG 700 (MDC 11).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):GEN001 — Nephritis; nephrosis; renal sclerosis.

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Principal diagnosis restriction (Medicare Code Editor)

Manifestation code — the underlying condition is sequenced first.

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Nephritis; nephrosis; renal sclerosis).

N07.2 — Hereditary nephropathy, not elsewhere classified with diffuse membranous glomerulonephritis, N07.3 — Hereditary nephropathy, not elsewhere classified with diffuse mesangial proliferative glomerulonephritis, N07.4 — Hereditary nephropathy, not elsewhere classified with diffuse endocapillary proliferative glomerulonephritis, N07.5 — Hereditary nephropathy, not elsewhere classified with diffuse mesangiocapillary glomerulonephritis, N07.6 — Hereditary nephropathy, not elsewhere classified with dense deposit disease, N07.7 — Hereditary nephropathy, not elsewhere classified with diffuse crescentic glomerulonephritis, N07.8 — Hereditary nephropathy, not elsewhere classified with other morphologic lesions, N07.9 — Hereditary nephropathy, not elsewhere classified with unspecified morphologic lesions, N07.A — Hereditary nephropathy, not elsewhere classified with C3 glomerulonephritis, N07.B — Hereditary nephropathy, not elsewhere classified with APOL1-mediated kidney disease [AMKD], N14.0 — Analgesic nephropathy, N14.1 — Nephropathy induced by other drugs, medicaments and biological substances, N14.11 — Contrast-induced nephropathy, N14.19 — Nephropathy induced by other drugs, medicaments and biological substances, N14.2 — Nephropathy induced by unspecified drug, medicament or biological substance, N14.3 — Nephropathy induced by heavy metals, N14.4 — Toxic nephropathy, not elsewhere classified, N15.0 — Balkan nephropathy, N15.8 — Other specified renal tubulo-interstitial diseases, N15.9 — Renal tubulo-interstitial disease, unspecified, +112 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Gamma-glutamyl Transferase (GGT) Test, Iron Panel, Partial Thromboplastin Time (PTT) Test

Contextual Map

Every relationship of N08 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run N08 with these 21 related codes in Claim Check

Hierarchy

• N00-N99 — Chapter 14: Diseases of the Genitourinary System (N00-N99) (N00-N99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• N00-N08 — Glomerular diseases[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Excludes1 (14)

• A52.75 — Syphilis of kidney and ureter[Excludes1]: “syphilis (A52.75)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• A54.21 — Gonococcal infection of kidney and ureter[Excludes1]: “gonococcal (A54.21)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• B26.83 — Mumps nephritis[Excludes1]: “mumps (B26.83)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D59.3 — Hemolytic-uremic syndrome[Excludes1]: “hemolytic-uremic syndrome (D59.3-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• E08 — Diabetes mellitus due to underlying condition[Excludes1]: “diabetes (E08-E13 with .21)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• E09 — Drug or chemical induced diabetes mellitus[Excludes1]: “diabetes (E08-E13 with .21)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• E10 — Type 1 diabetes mellitus[Excludes1]: “diabetes (E08-E13 with .21)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• E11 — Type 2 diabetes mellitus[Excludes1]: “diabetes (E08-E13 with .21)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• and 6 more

Code First (11)

• A40 — Streptococcal sepsis[Code First]: “sepsis (A40.0-A41.9)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• A41 — Other sepsis[Code First]: “sepsis (A40.0-A41.9)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• A50.5 — Other late congenital syphilis, symptomatic[Code First]: “congenital syphilis (A50.5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• C90.0 — Multiple myeloma[Code First]: “multiple myeloma (C90.0-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D57 — Sickle-cell disorders[Code First]: “sickle-cell disease (D57.0-D57.8)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D65 — Disseminated intravascular coagulation [defibrination syndrome][Code First]: “disseminated intravascular coagulation (D65)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D89.1 — Cryoglobulinemia[Code First]: “cryoglobulinemia (D89.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• E85 — Amyloidosis[Code First]: “amyloidosis (E85.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• and 3 more

Code Also

• N17 — Acute kidney failure[Code Also]: “any associated kidney failure (N17-N19).”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• N18 — Chronic kidney disease (CKD)[Code Also]: “any associated kidney failure (N17-N19).”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• N19 — Unspecified kidney failure[Code Also]: “any associated kidney failure (N17-N19).”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Use Additional Code instructions

• M10 — Gout[Use Additional Code]: “Glomerular disorders in diseases classified elsewhere (N08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• M1A — Chronic gout[Use Additional Code]: “Glomerular disorders in diseases classified elsewhere (N08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Index etiology/manifestation pairs

• B65.9 — Schistosomiasis, unspecified[Index manifestation]: “Glomerulonephritis, in, bilharziasis”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• B78.9 — Strongyloidiasis, unspecified[Index manifestation]: “Disorder, glomerular, strongyloidiasis”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• C88.0 — Waldenström macroglobulinemia[Index manifestation]: “Disorder, glomerular, Waldenström macroglobulinemia”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• D69.0 — Allergic purpura[Index manifestation]: “Disorder, glomerular, Henochpurpura”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• E75.21 — Fabry (-Anderson) disease[Index manifestation]: “Glomerulonephritis, in, Fabrydisease”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• E78.6 — Lipoprotein deficiency[Index manifestation]: “Glomerulonephritis, in, lecithin cholesterol acyltransferase deficiency”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• I33.0 — Acute and subacute infective endocarditis[Index manifestation]: “Disorder, glomerular, subacute bacterial endocarditis”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• M31.19 — Other thrombotic microangiopathy[Index manifestation]: “Disorder, glomerular, thrombotic thrombocytopenic purpura”— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Clinical classification (CCSR)

• GEN001 — Nephritis; nephrosis; renal sclerosis[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

MS-DRG Grouper

• DRG 698 — OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH MCC[MS-DRG]: “OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH MCC (MDC 11)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 699 — OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH CC[MS-DRG]: “OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH CC (MDC 11)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 700 — OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITHOUT CC/MCC[MS-DRG]: “OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITHOUT CC/MCC (MDC 11)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027

MDC crossing

• MDC 11 — Diseases and Disorders of the Kidney and Urinary Tract[MDC crossing]: “Diseases and Disorders of the Kidney and Urinary Tract — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 3,578 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates