LOINCActiveObservation

LOINC Code 12946-0: TSH 7th specimen post Unsp challenge Qn

12946-0 is a LOINC code used to identify TSH 7th specimen post Unsp challenge 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^7th specimen post XXX challenge. 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^7th specimen post XXX challenge. 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 --7th specimen post XXX challenge
  • Thyrotropin^7th specimen post XXX challenge
  • ^7th spec pst XXX chal; After; Arbitrary concentration; CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; p chal; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; sp7; sp7 p chal; Spec; 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 7th specimen post Unsp challenge QnThyrotropin [Units/volume] in Serum or Plasma --7th specimen post XXX challengeTSH sp7 p chal SerPl-aCncThyrotropin^7th specimen post XXX challengeCHALThyroid Stimulating Hormone (TSH; Thyrotropin) 7th specimen after challenge, BloodACnc

Frequently asked questions

Code details

Code12946-0
SystemLOINC
Display nameTSH 7th specimen post Unsp challenge Qn
DescriptionThyrotropin^7th specimen post XXX challenge
Short nameTSH sp7 p chal SerPl-aCnc
ComponentThyrotropin^7th specimen post XXX challenge
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 released1.0j-a
Last changed2.73

Consumer names

Thyroid Stimulating Hormone (TSH; Thyrotropin) 7th specimen after challenge, Blood

Part names

Thyrotropin^7th specimen post XXX challengeACncPtSer/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 12946-0 | HealthAssure