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LOINC Code 50732-7: Serotonin release 0.1 IU/mL heparin.low molecular weight Qn (S)

50732-7 is a LOINC code used to identify Serotonin release 0.1 IU/mL heparin.low molecular weight Qn (S) 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 Serotonin release 0.1 IU/mL heparin.low molecular weight. It is commonly used with the system or sample type Ser.

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 Serotonin release 0.1 IU/mL heparin.low molecular weight. It is commonly used with the system or sample type Ser.

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

Serotonin release 0.1 U/mL heparin.low molecular weight [Units/volume] in Serum
Serotonin release 0.1 IU/mL heparin.low molecular weight
Resulted as percentage of specific serotonin release(cpm test - cpm spont)/(cpm max - cpm spont) x 100, where cpm "spont" is the spontaneous release of [3H]serotonin from cells incubated in absence of antibodies, and cpm "max" is the maximum release of [3H]serotonin from cells lysed using 1% Triton X-100.
5-HT; 5-hydroxytryptamine; 5-hydroxytryptophane; Arbitrary concentration; C10H12N2O; Clexane; Enoxaparin; Enteramine; Hep; Hepar; Heparin dependent platelet antibody; Heparn; LMWH; Lovenox; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; Serotonin release assay; Serum; SR; SRA; SRA .1 IU/mL LMWH; SRA 0.1IU; SRA low 0.1; SRA low dose heparin; Wt

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

Serotonin release 0.1 IU/mL heparin.low molecular weight Qn (S)Serotonin release 0.1 U/mL heparin.low molecular weight [Units/volume] in SerumSRA 0.1U/mL LMW heparin Ser-aSerotonin release 0.1 IU/mL heparin.low molecular weightSEROSerotonin Release 0.1 IU/mL Heparin.low Molecular Weight, BloodACnc

Frequently asked questions

Code details

Code50732-7
SystemLOINC
Display nameSerotonin release 0.1 IU/mL heparin.low molecular weight Qn (S)
DescriptionSerotonin release 0.1 IU/mL heparin.low molecular weight
Short nameSRA 0.1U/mL LMW heparin Ser-a
ComponentSerotonin release 0.1 IU/mL heparin.low molecular weight
PropertyACnc
TimingPt
System (specimen)Ser
ScaleQn
ClassSERO
Example units%
StatusDISCOURAGED
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Serotonin Release 0.1 IU/mL Heparin.low Molecular Weight, Blood

Part names

Serotonin release 0.1 IU/mL heparin.low molecular weightACncPtSerQnArbitrary ConcentrationPoint in time (spot)Serum

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.