LOINCActiveBoth

LOINC Code 75100-8: Fatty acids (RBC) [Entitic substance]

75100-8 is a LOINC code used to identify Fatty acids (RBC) [Entitic substance] 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 Fatty acids. It is commonly used with the system or sample type RBC.

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 Fatty acids. It is commonly used with the system or sample type RBC.

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: Both

What it does not mean

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

Key facts

  • Fatty acids [Entitic substance] in Red Blood Cells
  • Fatty acids
  • Acd; Acid; Chemistry; Entitic substance; Erythrocytes; Fatty acid; Lipid; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles

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

Fatty acids (RBC) [Entitic substance]Fatty acids [Entitic substance] in Red Blood CellsFA EntSub RBCFatty acidsCHEMFatty acids, Red blood cellsEntSub

Frequently asked questions

Code details

Code75100-8
SystemLOINC
Display nameFatty acids (RBC) [Entitic substance]
DescriptionFatty acids
Short nameFA EntSub RBC
ComponentFatty acids
PropertyEntSub
TimingPt
System (specimen)RBC
ScaleQn
ClassCHEM
Example unitsumol/10*6 RBC
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.48
Last changed2.52

Consumer names

Fatty acids, Red blood cells

Part names

Fatty acidsEntSubPtRBCQnEntitic substancePoint in time (spot)Red Blood Cells

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 75100-8 | HealthAssure