LOINCActiveObservation

LOINC Code 48556-5: RBC.fetal/1000 RBC Kleihauer-Betke method (Bld) [Ratio]

48556-5 is a LOINC code used to identify RBC.fetal/1000 RBC Kleihauer-Betke method (Bld) [Ratio] 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.fetal/1000 erythrocytes. 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 Erythrocytes.fetal/1000 erythrocytes. 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: Kleihauer-Betke

What it does not mean

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

Key facts

  • Erythrocytes.fetal/1000 erythrocytes [Ratio] in Blood by Kleihauer-Betke method
  • Erythrocytes.fetal/1000 erythrocytes
  • 1000 RBC; Acid elution; Blood; Discocytes; Erthrocyte; Erythrocyte; Fetal cells; Fetal maternal hemorrhage screen; Fetal RBC; HEMATOLOGY/CELL COUNTS; Hemoglobin F-loaded erythrocytes; KB; Kleih Betke; Kleihauer stain; Kleihauer test; Kleihauer-Betke stain; Kleihauer-Betke test; Kleihauer-Braun-Betke; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells; Rto; 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

RBC.fetal/1000 RBC Kleihauer-Betke method (Bld) [Ratio]Erythrocytes.fetal/1000 erythrocytes [Ratio] in Blood by Kleihauer-Betke methodFetal RBC/1000 RBC Bld Kleih Betke-RtoErythrocytes.fetal/1000 erythrocytesHEM/BCFetal red blood cells per 1000 Red Blood Cells, BloodRatio

Frequently asked questions

Code details

Code48556-5
SystemLOINC
Display nameRBC.fetal/1000 RBC Kleihauer-Betke method (Bld) [Ratio]
DescriptionErythrocytes.fetal/1000 erythrocytes
Short nameFetal RBC/1000 RBC Bld Kleih Betke-Rto
ComponentErythrocytes.fetal/1000 erythrocytes
PropertyRatio
TimingPt
System (specimen)Bld
ScaleQn
MethodKleihauer-Betke
ClassHEM/BC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.21
Last changed2.73

Consumer names

Fetal red blood cells per 1000 Red Blood Cells, Blood

Part names

Erythrocytes.fetal/1000 erythrocytesRatioPtBldQnKleihauer-BetkePoint in time (spot)BloodKleihauer-Betke method

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 48556-5 | HealthAssure