Rare diseases · Sign or symptom

Abnormal hematocrit

HP:0031850

What it means

Any deviation from the normal ratio of the volume of red blood cells to the total volume of blood.

Note that the hematocrit is one of the measurements that can contribution to the diagnosis of anemia or polycythemia, which is coded separately.

Part of the broader category

Also called: Abnormal Hct

Abnormal hematocrit

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This page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.