Inclusion Body Myositis

Inclusion Body Myositis is indexed under Autoimmune & Inflammatory, Inflammatory Myopathies. Also known as IBM, sporadic inclusion body myositis.

US prevalence

~5-10 per 100,000 over age 50 Source: Myositis Association; NIH NINDS. Cites federal and non-federal sources, and the record does not say which one gave this figure. Label: REPORTED.

ICD-10-CM codes

G72.41

Typical onset

Typically >50; most common inflammatory myopathy in elderly

Course

progressive

Body systems

musculoskeletal

Sex differences

M:F ~3:1

Racial and ethnic differences

Limited data

What this page does not establish

These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.

Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.

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