LOINCActiveBoth

LOINC Code 51690-6: Amphetamines Screen Ql (Bld)

51690-6 is a LOINC code used to identify Amphetamines Screen Ql (Bld) 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 Amphetamines. It is commonly used with the system or sample type Bld.

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 Amphetamines. It is commonly used with the system or sample type Bld.

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: Both
  • Method: Screen

What it does not mean

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

Key facts

  • Amphetamines [Presence] in Blood by Screen method
  • Amphetamines
  • Addiction; Amph; Amphetam; Amphetamine; Blood; DRUG/TOXICOLOGY; Drugs; Drugs of abuse; Illicit; Ordinal; Point in time; PotentialForAbuse; PR; QL; Qual; Qualitative; Random; Scn; Scr; Screen; Scrn; Speed; WB; Whole blood

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

Amphetamines Screen Ql (Bld)Amphetamines [Presence] in Blood by Screen methodAmphetamines Bld Ql ScnAmphetaminesDRUG/TOXAmphetamines, BloodPrThr

Frequently asked questions

Code details

Code51690-6
SystemLOINC
Display nameAmphetamines Screen Ql (Bld)
DescriptionAmphetamines
Short nameAmphetamines Bld Ql Scn
ComponentAmphetamines
PropertyPrThr
TimingPt
System (specimen)Bld
ScaleOrd
MethodScreen
ClassDRUG/TOX
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.73

Consumer names

Amphetamines, Blood

Part names

AmphetaminesPrThrPtBldOrdScreenPresence or ThresholdPoint in time (spot)BloodToxicology 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.

LOINC Code 51690-6 | HealthAssure