What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 40400-4: TSH 30 Min post dose triple bolus Qn

Name: LOINC Code 40400-4: TSH 30 Min post dose triple bolus Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40400-4 is a LOINC code used to identify TSH 30 Min post dose triple bolus 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^30M post dose triple bolus. 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^30M post dose triple bolus. 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 --30 minutes post dose triple bolus
Thyrotropin^30M post dose triple bolus
30M p Triple Bolus; After; Arbitrary concentration; CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; p dose; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Thyroid stimulating hormone; Thyrotropic hormone; Tri; Trip; 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 30 Min post dose triple bolus QnThyrotropin [Units/volume] in Serum or Plasma --30 minutes post dose triple bolusTSH 30M p Triple Bolus SerPl-aCncThyrotropin^30M post dose triple bolusCHALThyroid Stimulating Hormone (TSH; Thyrotropin) 30 min after Triple Bolus, BloodACnc

Frequently asked questions

Code details

Code40400-4

SystemLOINC

Display nameTSH 30 Min post dose triple bolus Qn

DescriptionThyrotropin^30M post dose triple bolus

Short nameTSH 30M p Triple Bolus SerPl-aCnc

ComponentThyrotropin^30M post dose triple bolus

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 released2.15

Last changed2.70

Consumer names

Thyroid Stimulating Hormone (TSH; Thyrotropin) 30 min after Triple Bolus, Blood

Part names

Thyrotropin^30M post dose triple bolusACncPtSer/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.