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Test Code TSH THYROID-STIMULATING HORMONE (TSH), SERUM

Additional Codes

Software Test Code
Label Text                                TSH
EPIC LAB129                                

Performing Laboratory

NorDx Laboratories

Useful For

Providing differential diagnosis of primary (thyroid) from secondary (pituitary) and tertiary (hypothalamus) hypothyroidism; mildly subnormal TSH values (such as seen in euthyroidal hospitalized patients) from profoundly low values of frank hyperthyroidism

Method Name

Electrochemiluminescent Immunoassay (ECLIA) (Fourth Generation)

Reference Values

LOD 0.014 µIU/mL interassay variability < 20%

Female
0 - < 5 years: 0.84 - 6.22 µIU/L
5 - < 10 years: 0.48 - 4.81 µIU/L
10 - < 15 years: 0.76 - 4.20 µIU/L
15 - < 20 years: 0.45 - 4.50 µIU/L

Male
0 - < 5 years: 0.84 - 6.22 µIU/L
5 - < 10 years: 1.18 - 5.33 µIU/L
10 - < 15 years: 0.76 - 4.20 µIU/L
15 - < 20 years: 0.64 - 5.37 µIU/L

All Patients ≥ 20 years: 0.270 - 4.20 µIU/mL

Days and Times Test Performed

Monday through Sunday

Report Available

1 Day

Available Stat

Specimen Type

Serum

Preferred Container

Serum Separator Tube (SST)

Preferred Volume

Serum: 1 mL (Serum Separator Tube (SST))

Minimum Volume

Serum: 0.5 mL (Serum Separator Tube (SST))

Specimen Collection and Handling

Spin specimen, separate from clot and send refrigerated.

 

Specimen Stability Information

Specimen Type: Serum

Frozen: 1 Month

Refrigerated: 7 Days

Must be spun/separated within: 2 Hours

Add On Capable

Yes

Advance Beneficiary Notice Requirements

This test, when ordered on Medicare patients, is subject to the National Coverage Determination (NCD) policies. Please verify that the diagnosis code (ICD code) you have chosen demonstrates medical necessity for the test as documented in the physician’s patient record. The CMS web site is available to assist you with this verification. A properly executed Advance Beneficiary Notice (ABN) must be submitted with the specimen if medical necessity is not demonstrated by the ICD code chosen.

CPT Code Information

CPT Code

CPT Description

CPT Disclaimer
84443 Thyroid Stimulating Hormone (TSH), Quantitative  

Keywords

TSH SENSITIVE

HIGH SENSITIVITY TSH

ULTRASENSITIVE TSH

ADENOMA, PITUITARY

PITUITARY ADENOMA

PITUITARY BATTERY

SENSITIVE THYROID-STIMULATING HORMONE

THYROID-STIMULATING HORMONE (TSH)

THYROTROPIN

TSH (THYROID-STIMULATING HORMONE)

Performing Laboratory Location

NorDx Laboratories

Clinical Significance

Helpful in subclassifying hyperthyroid patients according to the degree of TSH suppression and aiding in the diagnosis of primary hyperthyroidism; monitoring patients on thyroid replacement therapy.

 

LOINC Code Information

3016-3

Acceptable Alternative Container(s)

Plasma Separator Tube (PST)

Red Top Tube

Orange Top Tube (Rapid clot serum)