Is M04.1 a billable ICD-10 code?

Yes. M04.1 (Periodic fever syndromes) is billable and can be used for insurance claims. Always verify payer-specific requirements.

M04.1 ✓ Billable

Periodic fever syndromes

Q: What is ICD-10 code M04.1?

ICD-10-CM code M04.1 stands for "Periodic fever syndromes". It is a billable code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue

Code

M04.1

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Diseases of the Musculoskeletal System and Connective Tissue

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code M04.1?

ICD-10-CM code M04.1 represents Periodic fever syndromes. It is a billable diagnosis code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.

Is M04.1 billable?

Yes. M04.1 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is M04.1 in?

M04.1 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.

Related codes in the M04 category

M04 Autoinflammatory syndromes Non-billable M04.2 Cryopyrin-associated periodic syndromes Billable M04.8 Other autoinflammatory syndromes Billable M04.9 Autoinflammatory syndrome, unspecified Billable

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