LOINCActiveObservation

LOINC Code 99866-6: Acanthocytes/Erythrocytes Computer assisted (Urine sed)

99866-6 is a LOINC code used to identify Acanthocytes/Erythrocytes Computer assisted (Urine sed) 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 Acanthocytes/Erythrocytes. It is commonly used with the system or sample type Urine sed.

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 Acanthocytes/Erythrocytes. It is commonly used with the system or sample type Urine sed.

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: Computer assisted

What it does not mean

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

Key facts

  • Acanthocytes/Erythrocytes in Urine sediment by Computer assisted method
  • Acanthocytes/Erythrocytes
  • Acanthocyte; Artificial Intelligence; Automated detection; Comp Assist; Discocytes; Erthrocyte; Erythrocyte; Number fraction; Percent; 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; Spur cells; UA; UR; URINALYSIS; Urine sediment; Urn; UrnS

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

Acanthocytes/Erythrocytes Computer assisted (Urine sed)Acanthocytes/Erythrocytes in Urine sediment by Computer assisted methodAcanthocytes/RBC NFr UrnS Com AssistAcanthocytes/ErythrocytesUAAcanthocytes/Erythrocytes, Urine sedimentNFr

Frequently asked questions

Code details

Code99866-6
SystemLOINC
Display nameAcanthocytes/Erythrocytes Computer assisted (Urine sed)
DescriptionAcanthocytes/Erythrocytes
Short nameAcanthocytes/RBC NFr UrnS Com Assist
ComponentAcanthocytes/Erythrocytes
PropertyNFr
TimingPt
System (specimen)Urine sed
ScaleQn
MethodComputer assisted
ClassUA
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.72
Last changed2.79

Consumer names

Acanthocytes/Erythrocytes, Urine sediment

Part names

Acanthocytes/ErythrocytesNFrPtUrine sedQnComputer assistedNumber FractionPoint in time (spot)Urine sedimentComputer assisted 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 99866-6 | HealthAssure