LOINCActiveObservation

LOINC Code 50503-2: Insulin spec 3 Qn

50503-2 is a LOINC code used to identify Insulin spec 3 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 Insulin^3rd specimen. 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 Insulin^3rd specimen. 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

  • Insulin [Units/volume] in Serum or Plasma --3rd specimen
  • Insulin^3rd specimen
  • Arbitrary concentration; CHEMISTRY.CHALLENGE TESTING; HUM; Humulin; IH7; Insul; Lente; NPH; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Semilente; SerP; SerPl; SerPlas; Serum; Serum or plasma; Sliding; sp3; Spec; SR; Ultralente

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

Insulin spec 3 QnInsulin [Units/volume] in Serum or Plasma --3rd specimenInsulin sp3 SerPl-aCncInsulin^3rd specimenCHALInsulin specimen 3, BloodACnc

Frequently asked questions

Code details

Code50503-2
SystemLOINC
Display nameInsulin spec 3 Qn
DescriptionInsulin^3rd specimen
Short nameInsulin sp3 SerPl-aCnc
ComponentInsulin^3rd specimen
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHAL
Example unitsmIU/mL;uIU/mL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.22
Last changed2.73

Consumer names

Insulin specimen 3, Blood

Part names

Insulin^3rd specimenACncPtSer/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 50503-2 | HealthAssure