Rare diseases · Sign or symptom
Hypermagnesemia
High blood magnesium levels
HP:0002918
What it means
The concentration of magnesium in the blood circulation is above the upper limit of normal.
Rare diseases that can present with this4
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Elevated magnesium(2+) concentration · Elevated magnesium(2+) level · Elevated magnesium(2+) level in blood · High blood Mg levels · Increased magnesium(2+) concentration · Increased magnesium(2+) level · Increased magnesium(2+) level in blood
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Start free with EleplanThis 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.