Test Details
Mnemonic
NMH24
Ordering Code
3800110
CPT-4 Code(s)
82542
Specimen Information
Patient Preparation
Patient must not be taking monoamine oxidase inhibitors (MAOIs) or aminoguanidine as these medications increase N-methylhistamine levels.
Collect
24 hour urine without preservative
Specimen Preparation
Mix well and send a 5.0 mL aliquot in a screw capped plastic vial.
Minimum Volume
3.0 mL
Transport Temperature
Refrigerated
Stability
Room temperature: 14 days
Refrigerated: 28 days
Frozen: 28 days
Refrigerated: 28 days
Frozen: 28 days
Methodology
NMH: Liquid Chromatography/Tandem Mass Spectrometry
Creatinine: Enzymatic Colorimetric Assay
Creatinine: Enzymatic Colorimetric Assay
Reference Range
0 - 5 years: 120-510 mcg/g creatine
6 - 16 years: 70-330 mcg/g creatinine
>16 years: 30-200 mcg/g creatinine
6 - 16 years: 70-330 mcg/g creatinine
>16 years: 30-200 mcg/g creatinine
Performing Laboratory
Mayo Clinic Laboratories
New York DOH Approval Status
Yes