Anpheros Search · Condition

Polyarteritis nodosa

Also known as: Vasculitis, unspecified

General information only. Anpheros does not diagnose and does not recommend treatment. Talk to a doctor or pharmacist about your situation. In an emergency, call 112 (or your local emergency number).

In short

Vasculitis is an inflammation of the blood vessels that occurs when the body's immune system attacks the blood vessels by mistake. It can affect arteries, veins, and capillaries, and it can be caused by an infection, a medicine, another disease, or an unknown cause. Inflamed blood vessels can narrow, close off completely, or stretch and weaken to form a bulge called an aneurysm. Symptoms usually include fever, swelling, and a general sense of feeling ill, and the main goal of treatment is to stop the inflammation.

Source: MedlinePlus, National Library of Medicine.

AI-generated summary of the sources cited on this page, checked automatically against them. Not reviewed by a clinician; not medical advice.

Codes

ICD-10: M30
ICD-11: 4A44.Z Vasculitis, unspecified

Description

Vasculitis is an inflammation of the blood vessels. It happens when the body's immune system attacks the blood vessel by mistake. It can happen because of an infection, a medicine, or another disease. The cause is often unknown.
Vasculitis can affect arteries, veins and capillaries. Arteries are vessels that carry blood from the heart to the body's organs. Veins are the vessels that carry blood back to the heart. Capillaries are tiny blood vessels that connect the small arteries and veins.
When a blood vessel becomes inflamed, it can:
Narrow, making it more difficult for blood to get through.
Close off completely so that blood can't get through.
Stretch and weaken so much that it bulges. The bulge is called an aneurysm. If it bursts, it can cause dangerous bleeding inside the body.
Symptoms of vasculitis can vary, but usually include fever, swelling and a general sense of feeling ill. The main goal of treatment is to stop the inflammation. Steroids and other medicines to stop inflammation are often helpful.
NIH: National Heart, Lung, and Blood Institute

Source: MedlinePlus, National Library of Medicine.

Next to it in ICD-10

Neighbouring codes in the classification, not a medical link.

External resources

Questions

What is the ICD-10 code for Polyarteritis nodosa?

M30 (WHO, International Classification of Diseases, 10th Revision).

What is the ICD-11 code for Polyarteritis nodosa?

4A44.Z: Vasculitis, unspecified (WHO, ICD-11 for Mortality and Morbidity Statistics).

Sources and attribution

Names other than the official source titles: Anpheros translations and plain-language names, made with AI assistance and checked automatically; the source names are in English.
Source: MedlinePlus, National Library of Medicine.
ICD-10 codes and titles © World Health Organization. Source: WHO, International Classification of Diseases, 10th Revision (2019).

Anpheros Search catalog 2026.10.5, published 17 October 2026. About the data →

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