Referred to Berkshire & Surrey Pathology Services, Frimley Park Hospital NHS Foundation Trust, Portsmouth Road, Frimley, Surrey GU16 7UJ

Alternative names, keywords


Samples required

EDTA blood (purple cap/ yellow cap ring, 4 mL tube), or random urine in plain container.


Test indications


Reference range

Whole blood: < 4.89 nmol/L

Urine: < 4.89 nmol/L

Note change to reference range from 4.2.2019

Turnaround time

Referral lab quotes turnaround time of 10 days, however additional time must be allowed for packing, dispatch and delivery of sample, and return and processing of results.


Biochemistry (Referrals)