Familial Hyperinsulinism (FHI)

CPT: 81401
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Test Details


Detect familial hyperinsulinism (FHI)


DNA analysis

Additional Information

Familial hyperinsulinism (FHI) occurs at increased frequency in individuals of Ashkenazi Jewish descent, with a carrier frequency of 1 in 66. FHI causes hypoglycemia ranging from mild to severe. Onset ranges from the newborn period to the first years of life. If left untreated, FHI may be lethal or result in irreversible neurological damage. Couples who are planning a pregnancy or who are already pregnant may decide to have testing to find out whether they are carriers and at risk of having a baby with FHI. FHI mutation analysis tests for two mutations for an 88% carrier detection rate in the Ashkenazi Jewish population.

Specimen Requirements


Whole blood, amniotic fluid, chorionic villus sample (CVS) (Submission of maternal blood is required for fetal testing.), or LabCorp buccal swab kit (Buccal swab collection kit contains instructions for use of a buccal swab.)


7 mL whole blood, 10 mL amniotic fluid, 20 mg CVS, or LabCorp buccal swab kit

Minimum Volume

3 mL whole blood, 5 mL amniotic fluid, 10 mg CVS, or two buccal swabs


Lavender-top (EDTA) tube, yellow-top (ACD) tube, sterile plastic conical tube or two confluent T-25 flasks for fetal testing, or LabCorp buccal swab kit

Storage Instructions

Maintain specimen at room temperature.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
450070 Familial Hyperinsulinism 451376 Familial Hyperinsulinism 51969-4
450070 Familial Hyperinsulinism 511948 PDF 51969-4

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