What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 81640-5: RBC Auto (Perit dial fld) [#/Vol]

Name: LOINC Code 81640-5: RBC Auto (Perit dial fld) [#/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:05.775Z

81640-5 is a LOINC code used to identify RBC Auto (Perit dial fld) [#/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 Dial fld prt.

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 Dial fld prt.

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

Erythrocytes [#/volume] in Peritoneal dialysis fluid by Automated count

Erythrocytes

Red blood cells may be present due to many causes, such as trauma during placement of the dialysis catheter, sclerosing or infectious peritonitis, or gynecologic disorders, ovulation, or menses.[PMID1553970]

#; ABS; absolute; absolutes; Auto; Automated detection; Cnt; Count; Count/volume; CT; Diaf; DiafP; Dialysate; Dialysis fluid; Discocytes; Elec; Elect; Electr; Erthrocyte; Erythrocyte; HEMATOLOGY/CELL COUNTS; Number concentration; Number Concentration (count/vol); Peritoneal Dialysis fluid; Point in time; QNT; Quan; Quant; Quantitative; Random; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red 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

RBC Auto (Perit dial fld) [#/Vol]Erythrocytes [#/volume] in Peritoneal dialysis fluid by Automated countRBC # DiafP AutoErythrocytesHEM/BCRed Blood Cell (RBC) Count, Peritoneal dialysis fluidNCnc

Frequently asked questions

Code details

Code81640-5

SystemLOINC

Display nameRBC Auto (Perit dial fld) [#/Vol]

DescriptionErythrocytes

Short nameRBC # DiafP Auto

ComponentErythrocytes

PropertyNCnc

TimingPt

System (specimen)Dial fld prt

ScaleQn

MethodAutomated count

ClassHEM/BC

Example units10*12/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.56

Consumer names

Red Blood Cell (RBC) Count, Peritoneal dialysis fluid

Part names

ErythrocytesNCncPtDial fld prtQnAutomated countNumber ConcentrationPoint in time (spot)Dialysis fluid peritoneal

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.