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M46

Non-billable

Other inflammatory spondylopathies

M46 is the ICD-10-CM code for Other inflammatory spondylopathies. It is a non-billable category code — use a more specific child code such as M46.0 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Subcodes
8
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

What this means — in plain language

MedlinePlus · NIH

What is ankylosing spondylitis? Ankylosing spondylitis (AS) is a type of arthritis of the spine. It causes inflammation (swelling) between your vertebrae (the bones that make up your spine) and the joints between your spine and pelvis. AS inflammation can cause stiffness and make it difficult to move and bend. Symptoms of AS can range from mild to severe back pain. Over time, AS can fuse (grow together) your…

Read more about Ankylosing Spondylitis at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code M46?
M46 is the ICD-10-CM code for "Other inflammatory spondylopathies". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M46 a billable code?
No — M46 is a non-billable header code. Use a more specific child code (such as M46.0) for billing.
What are the subcodes of M46?
M46 has 8 more specific child codes, including M46.0, M46.1, M46.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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