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Alkaline Phosphatase Isoenzymes
(a.k.a ALP isoenzymes, Alk Phos isoenzymes)
minimum sample volume required ~ 5ml
Test Code: ALI
Tube type: SST
Special instructions
Sent away
to Southmead Hospital
Linked to
ALP
Turnaround Time
7
days
Department: Biochemistry
Clinical Application
This is a qualitative test. The report produced will indicate the origin of elevated ALP, e.g. liver, bone, intestinal ALP etc.
ALP isoenzymes analysis is typically only useful where serum ALP is ≥200IU/L due to the qualitative nature of the test. Analysis may be useful where ALP is persistently ≥200IU/L, with a normal GGT and replete vitamin D and the cause/origin of raised ALP is unclear.
Webpage updated: April 2026.
