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 50727-7: Serotonin release 100 IU/mL heparin.unfractionated Qn (S)

Name: LOINC Code 50727-7: Serotonin release 100 IU/mL heparin.unfractionated Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.496Z

50727-7 is a LOINC code used to identify Serotonin release 100 IU/mL heparin.unfractionated 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 100 IU/mL heparin.unfractionated. 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 100 IU/mL heparin.unfractionated. 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: ACTIVE
Order vs observation: Observation

What it does not mean

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

Key facts

Serotonin release 100 IU/mL heparin.unfractionated [Units/volume] in Serum

Serotonin release 100 IU/mL heparin.unfractionated

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; Enteramine; Hep; Hepar; Heparin dependent platelet antibody; Heparn; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; Serotonin release assay; Serum; SR; SRA; SRA 100IU; SRA 100IU/mL UFH; UFH

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 100 IU/mL heparin.unfractionated Qn (S)Serotonin release 100 IU/mL heparin.unfractionated [Units/volume] in SerumSRA 100IU/mL UFH Ser-aCncSerotonin release 100 IU/mL heparin.unfractionatedSEROSerotonin Release 100 IU/mL Heparin.unfractionated, BloodACnc

Frequently asked questions

Code details

Code50727-7

SystemLOINC

Display nameSerotonin release 100 IU/mL heparin.unfractionated Qn (S)

DescriptionSerotonin release 100 IU/mL heparin.unfractionated

Short nameSRA 100IU/mL UFH Ser-aCnc

ComponentSerotonin release 100 IU/mL heparin.unfractionated

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassSERO

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.73

Consumer names

Serotonin Release 100 IU/mL Heparin.unfractionated, Blood

Part names

Serotonin release 100 IU/mL heparin.unfractionatedACncPtSerQnArbitrary 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.