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LOINC Code 58413-6: Nucleated RBC/Leukocytes Auto (Bld) [Ratio]

58413-6 is a LOINC code used to identify Nucleated RBC/Leukocytes Auto (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.nucleated/Leukocytes. It is commonly used with the system or sample type Bld.

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 Erythrocytes.nucleated/Leukocytes. 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

  • Nucleated erythrocytes/Leukocytes [Ratio] in Blood by Automated count
  • Erythrocytes.nucleated/Leukocytes
  • Auto; Automated detection; Blood; Discocytes; Elec; Elect; Electr; Erthrocyte; Erythroblasts; Erythrocyte; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Normoblasts; nRBC; nRBCs; Nuc; 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; WBC; 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

Nucleated RBC/Leukocytes Auto (Bld) [Ratio]Nucleated erythrocytes/Leukocytes [Ratio] in Blood by Automated countnRBC Bld Auto-RtoErythrocytes.nucleated/LeukocytesHEM/BCNucleated red blood cells/White Blood Cells, BloodRatio

Frequently asked questions

Code details

Code58413-6
SystemLOINC
Display nameNucleated RBC/Leukocytes Auto (Bld) [Ratio]
DescriptionErythrocytes.nucleated/Leukocytes
Short namenRBC Bld Auto-Rto
ComponentErythrocytes.nucleated/Leukocytes
PropertyRatio
TimingPt
System (specimen)Bld
ScaleQn
MethodAutomated count
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.30
Last changed2.79

Consumer names

Nucleated red blood cells/White Blood Cells, Blood

Part names

Erythrocytes.nucleated/LeukocytesRatioPtBldQnAutomated countPoint 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.