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.

LOINCObservation

LOINC Code 12686-2: Somatotropin 3rd specimen post Unsp challenge [Moles/Vol]

Name: LOINC Code 12686-2: Somatotropin 3rd specimen post Unsp challenge [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:23.604Z

12686-2 is a LOINC code used to identify Somatotropin 3rd specimen post Unsp challenge [Moles/Vol] 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 Somatotropin^3rd 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 Somatotropin^3rd 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: DISCOURAGED
Order vs observation: Observation

What it does not mean

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

Key facts

Somatotropin [Moles/volume] in Serum or Plasma --3rd specimen post XXX challenge
Somatotropin^3rd specimen post XXX challenge
After; CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; GH; Growth hormone; HGH; Human growth hormone; Level; p chal; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; Somatotropic hormone; sp3; sp3 p chal; Spec; SR; STH; Substance concentration

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

Somatotropin 3rd specimen post Unsp challenge [Moles/Vol]Somatotropin [Moles/volume] in Serum or Plasma --3rd specimen post XXX challengeGH sp3 p chal SerPl-sCncSomatotropin^3rd specimen post XXX challengeCHALSomatotropin 3rd specimen after challenge, BloodSCnc

Frequently asked questions

Code details

Code12686-2

SystemLOINC

Display nameSomatotropin 3rd specimen post Unsp challenge [Moles/Vol]

DescriptionSomatotropin^3rd specimen post XXX challenge

Short nameGH sp3 p chal SerPl-sCnc

ComponentSomatotropin^3rd specimen post XXX challenge

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

StatusDISCOURAGED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.44

Consumer names

Somatotropin 3rd specimen after challenge, Blood

Part names

Somatotropin^3rd specimen post XXX challengeSCncPtSer/PlasQnSubstance 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.