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 refrigerated 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

Methodology

NMH: Liquid Chromatography/Tandem Mass Spectrometry
Creatinine: Enzymatic Colorimetric Assay
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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
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Performing Laboratory

Mayo Clinic Laboratories
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New York DOH Approval Status

Yes
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