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HelpTest Code LAB129 TSH (Thyroid Stimulating Hormone)
Performing Laboratory
Asante Rogue Regional Medical Center / Asante Three Rivers Medical Center / Ashland Community Hospital
Specimen Minimum Volume
0.5 mL
Billing Code
2070647
Methodology
Third Generation Chemiluminescence (ultra-sensitive)
Specimen Requirements
Yellow (Gold) top tube (SST) Preferred
Lithium Heparin Green top tube
Outpatient clients MUST draw SST
Day(s) Test Set Up
Routine – same day
ASAP – 2 hours after receipt of specimen in lab
STAT – 1 hour after receipt of specimen in lab
Test Classification and CPT Coding
84443 - Thyroid stimulating hormone (TSH)
Additional Information
Thyroid function test. Important tool in the assessment of the origin, extent and management of thyroid disease. In cases of primary hypothyroidism, T3 and FT4 levels are low and TSH significantly elevated. In the case of pituitary dysfunction, normal or marginally elevated TSH levels are often seen despite reduction in FT4 and/or T3 levels. Primary hyperthyroidism (Graves disease, thyroid adenoma or nodular goiter) is associated with high levels of FT4 and/or T3 with depressed or undetectable levels of TSH.
Specimen Transport Temperature and Stability
Centrifuge and refrigerate within 2 hours of collection
Serum stable 48 hours if aliquoted and refrigerated at 2° to 8° C and serum or plasma is separated from cells by either aliquoting or use of a gel separator tube.
Separate and freeze if testing is delayed greater than 48 hours.
Reasons for Rejection
Hemolysis
Quantity not sufficient (QNS)
Lack of Two Patient Identifiers:
1-Patient's First & Last name
2-Patient's Date of Birth
Performing Department
Chemistry