Test Directory
| Test Code | ||
| TSHRF | ||
| Test Name | ||
| TSH With Reflex T4, Free | ||
| CPT Codes | ||
| 84443 | ||
| Included Tests | ||
Reflexed when appropriate:
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| Expected Turnaround Time | ||
| 1 day | ||
| Clinical Utility | ||
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Can be used to diagnose thyroid disorders, such as hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid). |
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| Specimen and Container Info | ||
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Specimen Types: Serum or Plasma Collection Containers:
Minimum Acceptable Volume: 2.4 mL |
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| Processing and Submission Instructions | ||
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Separator tubes: Contains clot activator and gel for separating serum from cells, but not anticoagulant. Separate serum from cells as soon as the clot has formed (30 minutes). If specimen is centrifuged before clotting is complete, a fibrin clot will form on top of the cell. This may cause the gel barrier to not be intact and could cause improper separation of serum and cells, possibly affecting test results. Tubes with anticoagulant: To ensure accurate test results, all tubes containing an anticoagulant or preservative must be allowed to fill completely. Attempts to force more blood into the tube by exerting pressure, as in collection with a syringe, will result in damage to the red cells (hemolysis). |
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| Transport Instructions | ||
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Transport to the laboratory refrigerated. |
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| Stability Requirements | ||
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| Methodology | ||
| Chemiluminescent Immunoassay | ||
| Reference Intervals | ||
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See individual test listings |
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| Performing Location | ||
| Hazleton Hospital, Pocono Hospital, Redeemer Health, Roble Road Core Laboratory, Schuylkill Hospital | ||
| Testing Schedule | ||
| Routine, daily | ||
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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