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 75812-8: Histamine H1 receptor antagonist Screen Ql (S/P/U) [Interp]

Name: LOINC Code 75812-8: Histamine H1 receptor antagonist Screen Ql (S/P/U) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:56.383Z

75812-8 is a LOINC code used to identify Histamine H1 receptor antagonist Screen Ql (S/P/U) [Interp] 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 Histamine H1 receptor antagonist. It is commonly used with the system or sample type Ser/Plas/Urine.

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 Histamine H1 receptor antagonist. It is commonly used with the system or sample type Ser/Plas/Urine.

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
Method: Screen

What it does not mean

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

Key facts

Histamine H1 receptor antagonist [Interpretation] in Serum or Plasma or Urine Qualitative by Screen method
Histamine H1 receptor antagonist
DRUG/TOXICOLOGY; Drugs; H1 recep antag; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Ordinal; Pl; Plasma; Plsm; Point in time; QL; Qual; Qualitative; Random; Rec; Recept; Receptors; Recp; Recptr; Scn; Scr; Screen; Scrn; Ser/Plas/Urn; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UA; UR; Urn

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

Histamine H1 receptor antagonist Screen Ql (S/P/U) [Interp]Histamine H1 receptor antagonist [Interpretation] in Serum or Plasma or Urine Qualitative by Screen methodH1 recep antag Ser/Plas/Urn Scn-ImpHistamine H1 receptor antagonistDRUG/TOXHistamine H1 receptor antagonist, Blood or urineImp

Frequently asked questions

Code details

Code75812-8

SystemLOINC

Display nameHistamine H1 receptor antagonist Screen Ql (S/P/U) [Interp]

DescriptionHistamine H1 receptor antagonist

Short nameH1 recep antag Ser/Plas/Urn Scn-Imp

ComponentHistamine H1 receptor antagonist

PropertyImp

TimingPt

System (specimen)Ser/Plas/Urine

ScaleOrd

MethodScreen

ClassDRUG/TOX

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.50

Last changed2.82

Consumer names

Histamine H1 receptor antagonist, Blood or urine

Part names

Histamine H1 receptor antagonistImpPtSer/Plas/UrineOrdScreenImpression/interpretation of studyPoint in time (spot)Serum or Plasma or UrineToxicology screen

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.