LOINCActiveObservation

LOINC Code 33269-2: TSH pre dose TRH Qn

33269-2 is a LOINC code used to identify TSH pre dose TRH Qn 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 Thyrotropin^pre dose TRH. 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 Thyrotropin^pre dose TRH. 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: Observation

What it does not mean

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

Key facts

  • Thyrotropin [Units/volume] in Serum or Plasma --pre dose TRH
  • Thyrotropin^pre dose TRH
  • Arbitrary concentration; Before; CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; Pl; Plasma; Plsm; Point in time; pre TRH; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Thyroid stimulating hormone; Thyrotropic hormone; TSH

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

TSH pre dose TRH QnThyrotropin [Units/volume] in Serum or Plasma --pre dose TRHTSH pre TRH SerPl-aCncThyrotropin^pre dose TRHCHALThyroid Stimulating Hormone (TSH; Thyrotropin) before dose TRH, BloodACnc

Frequently asked questions

Code details

Code33269-2
SystemLOINC
Display nameTSH pre dose TRH Qn
DescriptionThyrotropin^pre dose TRH
Short nameTSH pre TRH SerPl-aCnc
ComponentThyrotropin^pre dose TRH
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHAL
Example unitsmIU/L;mcU/mL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.70

Consumer names

Thyroid Stimulating Hormone (TSH; Thyrotropin) before dose TRH, Blood

Part names

Thyrotropin^pre dose TRHACncPtSer/PlasQnArbitrary ConcentrationPoint 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 33269-2 | HealthAssure