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  6. 2024 ICD-10-CM Code M31.1

2024 ICD-10-CM Diagnosis Code M31.1

Thrombotic microangiopathy

ICD-10-CM Code:
M31.1
ICD-10 Code for:
Thrombotic microangiopathy
Is Billable?
Not Valid for Submission
Chronic Condition Indicator: [1]
Chronic
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Code Classification

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

M31.1 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of thrombotic microangiopathy. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Thrombotic microangiopathy

Non-specific codes like M31.1 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for thrombotic microangiopathy:

  • Use M31.10 for Thrombotic microangiopathy, unspecified - BILLABLE CODE

  • Use M31.11 for Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] - BILLABLE CODE

  • Use M31.19 for Other thrombotic microangiopathy - BILLABLE CODE

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.

Convert M31.1 to ICD-9-CM

  • ICD-9-CM Code: 446.6 - Thrombot microangiopathy

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 - Code Added, 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.