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L103
L103 – Glucose tolerance test in pregnancy
OHIP Laboratory Medicine Code · Schedule of Benefits
Glucose tolerance test in pregnancy. Listed under 2.2 Biochemistry in the Schedule of Benefits for Laboratory Services (effective April 1, 2026). [Essential Specifications 9] Blood glucose by the dipstick method may be claimed only when assessed by an appropriate instrument such as a reflectance meter. It should not be claimed when used only as a check on the fasting blood sample of a glucose tolerance test. The blood glucose of the fasting sample in a glucose tolerance test is allowable only once even if assessed by two methods. • Note: A standard glucose tolerance test for the diagnosis of diabetes mellitus is performed over 2 hours and may include up to 5 blood glucose (L104) and 1 urine glucose determination (L253). If the patient is pregnant, up to 4 blood glucose specimens (L103) should be taken at hourly intervals). When 5-hour glucose tolerance test …
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