LOINCActiveObservation

LOINC Code 17790-7: WBC Left Shift Auto Ql (Bld)

17790-7 is a LOINC code used to identify WBC Left Shift Auto 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 Leukocytes.left shift. 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 Leukocytes.left shift. 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: Observation
  • Method: Automated count

What it does not mean

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

Key facts

  • Leukocytes Left Shift [Presence] in Blood by Automated count
  • Leukocytes.left shift
  • Auto; Automated detection; Blood; Elec; Elect; Electr; HEMATOLOGY/CELL COUNTS; L; Leuc; Leuk; Leukocyte; Lkcs; LT; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; WB; WBC; WBC Left Shift; WBCs; White blood cell; White blood cells; 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

WBC Left Shift Auto Ql (Bld)Leukocytes Left Shift [Presence] in Blood by Automated countWBC Left Shift Bld Ql AutoLeukocytes.left shiftHEM/BCWhite blood cell left shift, BloodPrThr

Frequently asked questions

Code details

Code17790-7
SystemLOINC
Display nameWBC Left Shift Auto Ql (Bld)
DescriptionLeukocytes.left shift
Short nameWBC Left Shift Bld Ql Auto
ComponentLeukocytes.left shift
PropertyPrThr
TimingPt
System (specimen)Bld
ScaleOrd
MethodAutomated count
ClassHEM/BC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

White blood cell left shift, Blood

Part names

Leukocytes.left shiftPrThrPtBldOrdAutomated countLeukocytes Left ShiftPresence or ThresholdPoint in time (spot)Blood

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 17790-7 | HealthAssure