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Test Code TSHPL Thyroid-Stimulating Hormone (TSH) with Reflex to FT4, Plasma or Serum

Additional Codes

Ordering Mnemonic
TSHPL

 

Methodology

Chemiluminescence

Reflex Information:

If the TSH falls outside of the reference values, the #90410 “T4 (Thyroxine), Free, Plasma or Serum” will be performed at an additional charge.

Performing Laboratory

Holland Hospital Laboratory Services

Specimen Requirements

Specimen must arrive within 48 hours of draw.

 

Submit only 1 of the following specimens:

 

Plasma

Container/Tube: Mint-top (lithium heparin) tube(s)

Specimen Volume: 1 mL of plasma

Collection Instructions:

Note: 1. Indicate plasma.

2. Label specimen appropriately (plasma).

 

Serum

Container/Tube: Serum gel tube(s)

Specimen Volume: 1 mL of serum

Collection Instructions:

Note: 1. Indicate serum.

2. Label specimen appropriately (serum).

Specimen Transport Temperature

Refrigerate ≤48 hours/Frozen OK

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

84443-TSH

84439-T4 free (if appropriate)

Reference Values

0.34-5.1 µIU/mL