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N-Methylhistamine, 24-Hour Urine
2011034
Ordering Recommendation

Aid in evaluation of patient with allergic signs and symptoms, such as anaphylaxis. May assist when diagnosing and monitoring mast-cell activation disorders or when evaluating histamine production over a longer time frame.

Mnemonic
NMETHYL U
Methodology
Quantitative Liquid Chromatography/Tandem Mass Spectrometry/Colorimetry
Performed
Varies
Reported
7-10 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
24-hour urine. 
Specimen Preparation
Transfer 5 mL urine to an ARUP Standard Transport Tube. (Min: 3 mL) 
Storage/Transport Temperature
Refrigerated. Also acceptable: Frozen. 
Unacceptable Conditions
 
Remarks
 
Stability
Ambient: 24 hours; Refrigerated: 8 days; Frozen: 2 weeks 
Reference Interval
By Report
Interpretive Data


Note
CPT Code(s)
82542
Components
Component Test Code*Component Chart NameLOINC
2011035Duration13362-9
2011036Volume28009-9
2011037N-Methylhistamine, Urine44340-8
2011038NMH, Creatinine Concentration2161-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • 1-Methylhistamine
  • Histamine Metabolites
  • Urinary N-Methylhistamine

Performed at Mayo