DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M31 Other necrotizing vasculopathies

  • Header · not billable

M31 is not billable. The category heads 13 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

  • Moschowitz' disease → M31.19
  • Goodpasture's syndrome → M31.0
  • Vasculopathy, necrotizing → M31.9

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M30-M36 Systemic connective tissue disorders (M30-M36)
  3. M31 Other necrotizing vasculopathies
Billable codes
13
Subdivisions
10
CC / MCC codes
8 / 3
HCC V28 codes
13
New FY2027
0
Index entries
62

Codes in M31

  1. M31.0
    Hypersensitivity angiitis
    BillableCC93
    Inclusion terms 1

    Inclusion terms

    • Goodpasture's syndrome
  2. M31.1
    Thrombotic microangiopathy
    Header
  3. M31.10
    Thrombotic microangiopathy, unspecified
    BillableMCC112
  4. M31.11
    Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
    BillableMCC454
    Inclusion terms 1, Code first 3, Use additional code 13

    Inclusion terms

    • Transplant-associated thrombotic microangiopathy [TA-TMA]

    Code first

    • if applicable:
    • complications of bone marrow transplant (T86.0-) T86.0
    • complications of stem cell transplant (T86.5) T86.5

    Use additional code

    • code to identify specific organ dysfunction, such as:
    • acute kidney failure (N17.-) N17
    • acute respiratory distress syndrome (J80) J80
    • capillary leak syndrome (I78.8) I78.8
    • diffuse alveolar hemorrhage (R04.89) R04.89
    • encephalopathy (metabolic) (septic) (G93.41) G93.41
    • fluid overload, unspecified (E87.70) E87.70
    • graft versus host disease (D89.81-) D89.81
    • hemolytic uremic syndrome (D59.3-) D59.3
    • hepatic failure (K72.-) K72
    • hepatic veno-occlusive disease (K76.5) K76.5
    • idiopathic interstitial pneumonia (J84.11-) J84.11
    • sinusoidal obstruction syndrome (K76.5) K76.5
  5. M31.19
    Other thrombotic microangiopathy
    BillableMCC112
    Inclusion terms 1

    Inclusion terms

    • Thrombotic thrombocytopenic purpura
  6. M31.2
    Lethal midline granuloma
    BillableCC93
  7. M31.3
    Wegener's granulomatosis
    Header
    Inclusion terms 2

    Inclusion terms

    • Granulomatosis with polyangiitis
    • Necrotizing respiratory granulomatosis
  8. M31.30
    Wegener's granulomatosis without renal involvement
    BillableCC93
    Inclusion terms 1

    Inclusion terms

    • Wegener's granulomatosis NOS
  9. M31.31
    Wegener's granulomatosis with renal involvement
    BillableCC93
  10. M31.4
    Aortic arch syndrome [Takayasu]
    BillableCC93
  11. M31.5
    Giant cell arteritis with polymyalgia rheumatica
    Billable94
  12. M31.6
    Other giant cell arteritis
    Billable94
  13. M31.7
    Microscopic polyangiitis
    BillableCC94
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Microscopic polyarteritis

    Excludes1

    • polyarteritis nodosa (M30.0) M30.0
  14. M31.8
    Other specified necrotizing vasculopathies
    BillableCC94
    Inclusion terms 2

    Inclusion terms

    • Hypocomplementemic vasculitis
    • Septic vasculitis
  15. M31.9
    Necrotizing vasculopathy, unspecified
    BillableCC94

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Block M30-M36 instructions (Includes 4, Excludes1 1): printed on the block page.

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.

Index entries

  • Goodpasture's syndrome → M31.0
  • HSCT-TMA (hematopoietic stem cell transplantation-associated thrombotic microangiopathy) → M31.11
  • Moschowitz' disease → M31.19
  • Wegener's granulomatosis or syndrome → M31.30
  • Takayasu's disease or syndrome → M31.4
  • Microscopic polyangiitis (polyarteritis) → M31.7
  • Vasculopathy, necrotizing → M31.9
  • Angiitishypersensitivity → M31.0
  • Arteritisallergic → M31.0
  • Disease, diseasedantiglomerular basement membrane (anti- GBM) antibody → M31.0
  • Vasculitisleukocytoclastic → M31.0
  • Microangiopathy (peripheral)thrombotic → M31.10
  • Purpurathrombotic, thrombocytopenic → M31.19
  • Granulomagangraenescens → M31.2
  • Granulomalethal midline (faciale(e)) → M31.2
  • Granulomamalignant (facial(e)) → M31.2
  • Granulomamidline (lethal) → M31.2
  • Granulomatosiswith polyangiitis → M31.3-
  • Granulomatosisnecrotizing, respiratory → M31.30
  • GranulomatosisWegener's → M31.30
  • SyndromeWegener's → M31.30
  • Arteritisaortic arch → M31.4
  • Arteritisbrachiocephalic → M31.4
  • Arteritisyoung female aortic arch syndrome → M31.4
  • Disease, diseasedpulseless → M31.4
  • Polymyalgiaarteritica, giant cell → M31.5
  • Arteritiscranial (left) (right), giant cell → M31.6
  • Arteritisgiant cell NEC → M31.6
  • Arteritistemporal, giant cell → M31.6
  • Polyangiitismicroscopic → M31.7
  • Polyarteritismicroscopic → M31.7
  • Vasculitishypocomplementemic → M31.8
  • Vasculitissystemic → M31.8
  • Vasculopathy, necrotizingspecified NEC → M31.8
  • Angiitisnecrotizing → M31.9
  • Arteritisnecrosing or necrotizing → M31.9
  • Disorder (of)glomerular (in)Goodpasture's syndrome → M31.0
  • Glomerulonephritisin (due to)Goodpasture's syndrome → M31.0
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)antiglomerular basement membrane (anti-GBM) antibody NECin Goodpasture's syndrome → M31.0
  • Syndromepulmonaryrenal (hemorrhagic) (Goodpasture's) → M31.0

22 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy