Elevated Urinary N Methylhistamine Level C5937296
Elevated histamine breakdown product in urine, often associated with mast cell disorders like mastocytosis. It can affect both children and adults and requires management of the underlying mast cell condition.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- moderate
- Chronic
- true
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy