2020 ICD-10-CM Diagnosis Code M31.7

Microscopic polyangiitis

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M31.7 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM M31.7 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M31.7 - other international versions of ICD-10 M31.7 may differ.
Applicable To
  • Microscopic polyarteritis
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as M31.7. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • polyarteritis nodosa (
    ICD-10-CM Diagnosis Code M30.0

    Polyarteritis nodosa

      2016 2017 2018 2019 2020 Billable/Specific Code
The following code(s) above M31.7 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M31.7:
  • M00-M99
    2020 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M30-M36
    2020 ICD-10-CM Range M30-M36

    Systemic connective tissue disorders

    • autoimmune disease NOS
    • collagen (vascular) disease NOS
    • systemic autoimmune disease
    • systemic collagen (vascular) disease
    Type 1 Excludes
    • autoimmune disease, single organ or single cell-type -code to relevant condition category
    Systemic connective tissue disorders
Approximate Synonyms
  • Microscopic polyarteritis nodosa
Clinical Information
  • A primary systemic vasculitis of small- and some medium-sized vessels. It is characterized by a tropism for kidneys and lungs, positive association with anti-neutrophil cytoplasmic antibodies (anca), and a paucity of immunoglobulin deposits in vessel walls.
  • A systemic necrotizing vasculitis that typically affects the small and medium-sized muscular arteries. In some cases, however, microscopic vessels are also affected (e.g., in the kidneys), a condition that has been called microscopic polyarteritis or polyangiitis; this disorder is felt to be more closely associated with wegener's granulomatosis than to classic polyarteritis nodosa.
ICD-10-CM M31.7 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 545 Connective tissue disorders with mcc
  • 546 Connective tissue disorders with cc
  • 547 Connective tissue disorders without cc/mcc

Convert M31.7 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to M31.7:
  • Code First: N08
    ICD-10-CM Diagnosis Code N08

    Glomerular disorders in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Applicable To
    • Glomerulonephritis
    • Nephritis
    • Nephropathy
    Code First
    Type 1 Excludes
    • 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)
  • Type 1 Excludes: M30
    ICD-10-CM Diagnosis Code M30

    Polyarteritis nodosa and related conditions

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • microscopic polyarteritis (M31.7)

Diagnosis Index entries containing back-references to M31.7:
  • Disorder (of) - see also Disease
    • glomerular (in) N05.9
      ICD-10-CM Diagnosis Code N05.9

      Unspecified nephritic syndrome with unspecified morphologic changes

        2016 2017 2018 2019 2020 Billable/Specific Code
      • microscopic polyangiitis M31.7
  • Glomerulonephritis N05.9
    - see also Nephritis
    ICD-10-CM Diagnosis Code N05.9

    Unspecified nephritic syndrome with unspecified morphologic changes

      2016 2017 2018 2019 2020 Billable/Specific Code
    • in (due to)
      • microscopic polyangiitis M31.7
  • Microscopic polyangiitis M31.7 (polyarteritis)
  • Polyangiitis M30.0
    ICD-10-CM Diagnosis Code M30.0

    Polyarteritis nodosa

      2016 2017 2018 2019 2020 Billable/Specific Code
    • microscopic M31.7
  • Polyarteritis
    • microscopic M31.7
  • Polyneuropathy (peripheral) G62.9
    ICD-10-CM Diagnosis Code G62.9

    Polyneuropathy, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Neuropathy NOS
    • in (due to)
      • microscopic polyangiitis M31.7

ICD-10-CM Codes Adjacent To M31.7
M31 Other necrotizing vasculopathies
M31.0 Hypersensitivity angiitis
M31.1 Thrombotic microangiopathy
M31.2 Lethal midline granuloma
M31.3 Wegener's granulomatosis
M31.30 …… without renal involvement
M31.31 …… with renal involvement
M31.4 Aortic arch syndrome [Takayasu]
M31.5 Giant cell arteritis with polymyalgia rheumatica
M31.6 Other giant cell arteritis
M31.7 Microscopic polyangiitis
M31.8 Other specified necrotizing vasculopathies
M31.9 Necrotizing vasculopathy, unspecified
M32 Systemic lupus erythematosus (SLE)
M32.0 Drug-induced systemic lupus erythematosus
M32.1 Systemic lupus erythematosus with organ or system involvement
M32.10 Systemic lupus erythematosus, organ or system involvement unspecified
M32.11 Endocarditis in systemic lupus erythematosus
M32.12 Pericarditis in systemic lupus erythematosus
M32.13 Lung involvement in systemic lupus erythematosus
M32.14 Glomerular disease in systemic lupus erythematosus

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.