1. Home
  2. ICD-10-CM Codes
  3. M00–M99
  4. M30-M36
  5. M31
  6. 2024 ICD-10-CM Code M31.9

2024 ICD-10-CM Diagnosis Code M31.9

Necrotizing vasculopathy, unspecified

ICD-10-CM Code:
M31.9
ICD-10 Code for:
Necrotizing vasculopathy, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Chronic
Code Navigator:

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    (M00–M99)
    • Systemic connective tissue disorders
      (M30-M36)
      • Other necrotizing vasculopathies
        (M31)

M31.9 is a billable diagnosis code used to specify a medical diagnosis of necrotizing vasculopathy, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like M31.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Cryoglobulinemic vasculitis
  • Cutaneous complication of systemic sclerosis
  • Drug-induced necrotizing vasculitis
  • Lupus erythematosus-associated necrotizing vasculitis
  • Lupus vasculitis
  • Necrosis of artery
  • Necrotizing arteritis
  • Necrotizing cutaneous vasculitis
  • Necrotizing vasculitis
  • Necrotizing vasculitis due to mixed cryoglobulinemia
  • Necrotizing vasculitis secondary to connective tissue disease
  • Necrotizing vasculitis secondary to connective tissue disease
  • Scleroderma-associated necrotizing vasculitis
  • Small vessel vasculitis caused by immune complex
  • Vasculitis secondary to drug

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
Systemic lupus erythematosus and connective tissue disordersMUS024Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.
VasculitisCIR037N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Necrotizing Vasculitis

    a rare condition that involves inflammation and necrosis of the walls of the blood vessels; may occur in rheumatoid arthritis.

  • Necrotizing Arteritis

    an arteritis characterized by the presence of inflammation and necrosis in the arterial wall.

  • Overlap Necrotizing Arteritis

    a necrotizing arteritis that exhibits characteristic features of several distinct vascular disorders.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert M31.9 to ICD-9-CM

  • ICD-9-CM Code: 447.5 - Necrosis of artery
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.