M04
Non-billableAutoinflammatory syndromes
M04 is the ICD-10-CM code for Autoinflammatory syndromes. It is a non-billable category code — use a more specific child code such as M04.1 for billing.
- Status
- Header (non-billable)
- Chapter
- M00-M99
- Subcodes
- 4
- Edition
- FY2026
M00-M99 Diseases of the musculoskeletal system and connective tissue
What this means — in plain language
MedlinePlus · NIHWhat are autoimmune diseases? Your immune system protects you from disease and infection by attacking germs that get into your body, such as viruses and bacteria. Your immune system can tell that the germs aren't part of you, so it destroys them. If you have an autoimmune disease, your immune system attacks the healthy cells of your organs and tissues by mistake. There are more than 80 types of autoimmune diseases.…
Read more about Autoimmune Diseases at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes2 — not included here
- •Crohn's disease (K50.-)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition