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 21131-8: Calcitonin 10 Min post 0.5 ug/kg pentagastrin IV [Mass/Vol]

Name: LOINC Code 21131-8: Calcitonin 10 Min post 0.5 ug/kg pentagastrin IV [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:29.459Z

21131-8 is a LOINC code used to identify Calcitonin 10 Min post 0.5 ug/kg pentagastrin IV [Mass/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 Calcitonin^10M post 0.5 ug/kg pentagastrin IV. 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 Calcitonin^10M post 0.5 ug/kg pentagastrin IV. 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

Calcitonin [Mass/volume] in Serum or Plasma --10 minutes post 0.5 ug/kg pentagastrin IV
Calcitonin^10M post 0.5 ug/kg pentagastrin IV
10M p 0.5 ug/kg Pg IV; After; CHEMISTRY.CHALLENGE TESTING; CT; Level; Mass concentration; mcg; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Thyrocalcitonin; Tumor marker

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

Calcitonin 10 Min post 0.5 ug/kg pentagastrin IV [Mass/Vol]Calcitonin [Mass/volume] in Serum or Plasma --10 minutes post 0.5 ug/kg pentagastrin IVCalcit 10M p 0.5 ug/kg Pg IV SerPl-mCncCalcitonin^10M post 0.5 ug/kg pentagastrin IVCHALCalcitonin 10 min after 0.5 ug/kg Pentagastrin intravenous, BloodMCnc

Frequently asked questions

Code details

Code21131-8

SystemLOINC

Display nameCalcitonin 10 Min post 0.5 ug/kg pentagastrin IV [Mass/Vol]

DescriptionCalcitonin^10M post 0.5 ug/kg pentagastrin IV

Short nameCalcit 10M p 0.5 ug/kg Pg IV SerPl-mCnc

ComponentCalcitonin^10M post 0.5 ug/kg pentagastrin IV

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitspg/mL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.34

Consumer names

Calcitonin 10 min after 0.5 ug/kg Pentagastrin intravenous, Blood

Part names

Calcitonin^10M post 0.5 ug/kg pentagastrin IVMCncPtSer/PlasQnMass 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.