BM

Medical Abbreviation
BM

BM is a medical abbreviation with more than one meaning — most commonly Bowel movement / Bone marrow. Its meaning depends on the clinical context.

What does BM mean?

MeaningContextField
Bowel movementGeneral and nursing notesGeneral
Bone marrowHematologyHematology
Breast milkPediatrics and maternityPediatrics

Why it matters

BM commonly means bowel movement in ward notes, but bone marrow in hematology and breast milk in pediatrics. The specialty usually makes it clear.

Frequently asked questions

Does BM mean bowel movement or bone marrow?

Both. In general nursing notes it usually means bowel movement; in hematology it means bone marrow.

Related abbreviations

GI · Hx · Dx

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Study reference only — not medical advice. Always consult qualified sources and supervisors for clinical decisions.