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Test Catalog

Test ID: GALP    
Galactose, Quantitative, Plasma

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Useful For Suggests clinical disorders or settings where the test may be helpful

Screening for galactosemia


Galactose-1-phosphate uridyltransferase (GALT) deficiency is the most common cause of galactosemia and requires lifelong restriction of dietary galactose.


Classic galactosemia can be diagnosed by analysis of GALT enzyme.


The preferred test to evaluate for possible diagnosis of galactosemia, routine carrier screening, and follow-up of abnormal newborn screening results is GCT / Galactosemia Reflex, Blood.


For monitoring of dietary compliance, see GAL1P / Galactose-1-Phosphate (Gal-1-P), Erythrocytes.

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

This test is not appropriate for the diagnosis or monitoring of galactosemia. For diagnosis, see GCT / Galactosemia Reflex, Blood. For monitoring, see GAL1P / Galactose-1-phosphate (Gal-1-P), Erythrocytes.


See Galactosemia Testing Algorithm in Special Instructions.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

Method Name A short description of the method used to perform the test

Spectrophotometric, Kinetic

Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

Galactose, QN, P

Aliases Lists additional common names for a test, as an aid in searching