Email Us

ContactUs@RockyLabs.com

Call Us

(833) 765-5227

Service Request
(833) 765-5227
Service Request

T Uptake

Specimen Container

Gold

Specimen Collection Type

Serum

Specimen Preparation

Allow clot, separate < 2hrs

Stability

Ambient Stability: 8 days
Refrig Stability: 2 weeks
Frozen Stability: 2 Years

Unacceptable Conditions

Grossly hemolyzed specimens.

Preferred Transportation Temperature

REFRIGERATED

Remarks

T uptake is of little clinical value alone; it is used to determine the free thyroxine index

Performed

Sun-Sat

Reported

Within 24 hours

Methodology

Quantitative Electrochemiluminescent Immunoassay (ECLIA)

Lab Department

Core

Testing Location

IHC

Synonyms

Free thyroxine index
FT4 index
FTI
T4 uptake
T7
Thyroxine index
T4 uptake, S
T4U, serum
TBC
Thyroid binding ratio
Triiodothyronine uptake, serum
THBR
Thyroxine-binding capacity
Thyroxine-binding index
T3 Uptake

Test OR Panel

Test

Interferences

Avoid hemolysis

Misc Instructions

Allow specimen to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

CPT Codes

84479

LOINC

74795-6

Streamlined Online Payments

Simplify payments with our user-friendly online system. Quick, secure, and hassle-free. Experience convenience with every click.

Pay Now

Instant Confirmation, Every Time

Receive instant payment confirmations for peace of mind. Swift transactions, reliable updates. Elevate your payment experience with us.

Confirm Payment

24 / 7 Payment Access

Access our online payment portal anytime, anywhere. Your bills, your schedule. Experience the freedom of 24/7 payment convenience.

Pay Anytime

Elevating Lives Through Expert Care. Experience Compassion and Excellence with Rocky Mountain Laboratories. Enriching Wellness Together.

Icon-facebook Twitter Instagram Linkedin-in

Quick Links

Partners

Contact Details

ROCKY MOUNTAIN LABORATORIES

Copyright © 2025 All rights reserved.