LOINCActiveObservation

LOINC Code 5799-2: Leukocyte esterase Test strip Ql (U)

5799-2 is a LOINC code used to identify Leukocyte esterase Test strip Ql (U) 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 Leukocyte esterase. It is commonly used with the system or sample type Urine.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Leukocyte esterase. It is commonly used with the system or sample type 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: Test strip

What it does not mean

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

Key facts

  • Leukocyte esterase [Presence] in Urine by Test strip
  • Leukocyte esterase
  • Dip stick; Dipstick; Leuc; Leuk; Leukocytes; Lkcs; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; UA; UR; URINALYSIS; Urn; WBC; WBCs; White blood cell; White blood cells

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

Leukocyte esterase Test strip Ql (U)Leukocyte esterase [Presence] in Urine by Test stripLeukocyte esterase Ur Ql StripLeukocyte esteraseUALeukocyte esterase, UrinePrThr

Frequently asked questions

Code details

Code5799-2
SystemLOINC
Display nameLeukocyte esterase Test strip Ql (U)
DescriptionLeukocyte esterase
Short nameLeukocyte esterase Ur Ql Strip
ComponentLeukocyte esterase
PropertyPrThr
TimingPt
System (specimen)Urine
ScaleOrd
MethodTest strip
ClassUA
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.73

Consumer names

Leukocyte esterase, Urine

Part names

Leukocyte esterasePrThrPtUrineOrdTest stripPresence or ThresholdPoint in time (spot)

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 5799-2 | HealthAssure