Posted Date
Effective Date
Test Name N-Methyl Histamine, Random Urine
Update Type Reference range changed
CPT Code 82542
Order Code NMHR

REFERENCE RANGE CHANGE

 

N-Methyl Histamine, Random Urine

Order Code:                  NMHR

Fee Code:                     AA223 (CPT 82542)

LOINC:                         13781-0

Reference Laboratory:   Mayo NMHR

 

Please note that there will be a change to the reference range for the N-Methyl Histamine, Random Urine assay effective September 14, 2026:

 

Reference Range: 

N-METHYLHISTAMINE

0-5 years: 85-369 mcg/g creatinine 

6-16 years: 48-238 mcg/g creatinine 

>16 years: 19-143 mcg/g creatinine

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