ICD-10-CM M31.7 is the diagnosis code for Microscopic polyangiitis. This code falls under the section "Systemic connective tissue disorders" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as M31.7. They are mutually exclusive:
Understanding where M31.7 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M31.7 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M31.7 is the ICD-10-CM diagnosis code for "Microscopic polyangiitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M31.7 is M31 ("Other necrotizing vasculopathies"). M31.7 provides a more specific classification within this category.
M31.7 is located in Section M30-M36 — "Systemic connective tissue disorders" within Chapter 13 of the ICD-10-CM Tabular List.
Use M31.7 when the patients documented diagnosis matches "Microscopic polyangiitis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Microscopic polyangiitis is M31.7.
Yes, M31.7 can be used as a primary diagnosis code since it is billable and specific.
M31.7 is in Chapter 13 of the ICD-10-CM Tabular List.
Type 1 Excludes for M31.7 include: polyarteritis nodosa (M30.0).
Yes, M31.7 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.