M04.1Billable

Periodic fever syndromes

Chapter
13. Diseases of the musculoskeletal system and connective tissue
Category
M04
Effective date
October 1, 2026

Related codes in category M04

M04Autoinflammatory syndromesM04.2Cryopyrin-associated periodic syndromesYesM04.3VEXAS syndromeYesM04.8Other autoinflammatory syndromesYesM04.9Autoinflammatory syndrome, unspecifiedYes

Frequently asked questions

What is ICD-10 code M04.1?

M04.1 is an ICD-10-CM diagnosis code for Periodic fever syndromes.

Is M04.1 a billable code?

Yes. M04.1 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is M04.1 in?

M04.1 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.

When did M04.1 become effective?

M04.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to M04.1?

M04.1 belongs to category M04, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.