LOINCActiveBoth

LOINC Code 74793-1: Thyroid hormone uptake (T-uptake)

74793-1 is a LOINC code used to identify Thyroid hormone uptake (T-uptake) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Thyroid hormone uptake. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Thyroid hormone uptake. It is commonly used with the system or sample type Ser/Plas.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Thyroid hormone uptake (T-uptake) in Serum or Plasma
  • Thyroid hormone uptake
  • Chemistry; Horm; Number fraction; Percent; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; T3 uptake; T3U; T4; Thyroxine Uptake; Triiodothyroinine uptake; T-uptake

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Thyroid hormone uptake (T-uptake)Thyroid hormone uptake (T-uptake) in Serum or PlasmaT-uptake NFr SerPlThyroid hormone uptakeCHEMThyroid Hormone Uptake (T-uptake), BloodNFr

Frequently asked questions

Code details

Code74793-1
SystemLOINC
Display nameThyroid hormone uptake (T-uptake)
DescriptionThyroid hormone uptake
Short nameT-uptake NFr SerPl
ComponentThyroid hormone uptake
PropertyNFr
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.48
Last changed2.73

Consumer names

Thyroid Hormone Uptake (T-uptake), Blood

Part names

Thyroid hormone uptakeNFrPtSer/PlasQnThyroid hormone uptake (T-uptake)Number FractionPoint in time (spot)Serum or Plasma

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 74793-1 | HealthAssure