LOINCActiveObservation

LOINC Code 57747-8: RBC Auto test strip (U) [#/Vol]

57747-8 is a LOINC code used to identify RBC Auto test strip (U) [#/Vol] 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 Erythrocytes. It is commonly used with the system or sample type 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 Erythrocytes. 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.automated

What it does not mean

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

Key facts

  • Erythrocytes [#/volume] in Urine by Automated test strip
  • Erythrocytes
  • The test strip is semiquantitaive and measures Hb, but the strip reader can also convert the measured concentration to an estimated number of RBCs per uL. This test is often called blood UA and may also be reported as categorical grades. But each of them would be reported under different LOINC codes.
  • #; ABS; absolute; absolutes; Auto; Automated detection; Cnt; Count; Count/volume; CT; Dip stick; Dipstick; Discocytes; Elec; Elect; Electr; Erthrocyte; Erythrocyte; Number concentration; Number Concentration (count/vol); Point in time; Random; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells; SmQn; UA; UR; URINALYSIS; 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

RBC Auto test strip (U) [#/Vol]Erythrocytes [#/volume] in Urine by Automated test stripRBC # Ur Strip.autoErythrocytesUARed Blood Cell (RBC) Count, UrineNCnc

Frequently asked questions

Code details

Code57747-8
SystemLOINC
Display nameRBC Auto test strip (U) [#/Vol]
DescriptionErythrocytes
Short nameRBC # Ur Strip.auto
ComponentErythrocytes
PropertyNCnc
TimingPt
System (specimen)Urine
ScaleSemiQn
MethodTest strip.automated
ClassUA
Example units/uL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.75

Consumer names

Red Blood Cell (RBC) Count, Urine

Part names

ErythrocytesNCncPtUrineSemiQnTest strip.automatedNumber ConcentrationPoint in time (spot)Test strip automated

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 57747-8 | HealthAssure