Total testosterone (TT) should be the first test performed for the assessment of androgen deficiency.
In adult males (>18 yrs.), SHBG should only be done on patients whose TT lies within the upper half of the subnormal range + 10% (4-10 nmol/L for current Centaur method).
SHBG may be requested and measured in females between the ages of 19-49, or in others if approved by the laboratory physician, as clinically warranted.
For males, the morning specimen should be collected before 11 AM.
Designated approved on a provisional basis awaiting further review.
Please reference the billing pre-amble for these relevant interpretations of this billing code:See Pre-Amble Notes