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Test Code TGMS Thyroglobulin Mass Spectrometry, Serum

Specimen Type

Serum Red


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Red top

Acceptable: None (gel tubes/SST are not acceptable)

Submission Container/Tube: Plastic vial

Specimen Volume: 1.25 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 7 days
  Frozen  416 days
  Ambient  72 hours

Reject Due To

Gross hemolysis Reject
Gross lipemia OK
Gross icterus OK

Reference Values

Healthy individuals with intact, functioning thyroid: ≤33 ng/mL

Day(s) Performed

Monday through Friday

Report Available

3 to 10 days

Specimen Retention Time

14 months

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

84432