LOINCActiveObservation

LOINC Code 99621-5: Omega 6 fatty acids (w6) (RBC.lysate) [Moles/Vol]

99621-5 is a LOINC code used to identify Omega 6 fatty acids (w6) (RBC.lysate) [Moles/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 Fatty acids.omega 6. It is commonly used with the system or sample type RBC.lysate.

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.omega 6. It is commonly used with the system or sample type RBC.lysate.

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

What it does not mean

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

Key facts

  • Omega 6 fatty acids (w6) [Moles/volume] in RBC.lysate
  • Fatty acids.omega 6
  • Acd; Acid; Chemistry; Erythrocytes; Fatty acid; Level; Lipid; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles; Substance concentration; w6 FA

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

Omega 6 fatty acids (w6) (RBC.lysate) [Moles/Vol]Omega 6 fatty acids (w6) [Moles/volume] in RBC.lysatew6 FA RBC.lysate-sCncFatty acids.omega 6CHEMOmega 6 fatty acids (w6), RBC.lysateSCnc

Frequently asked questions

Code details

Code99621-5
SystemLOINC
Display nameOmega 6 fatty acids (w6) (RBC.lysate) [Moles/Vol]
DescriptionFatty acids.omega 6
Short namew6 FA RBC.lysate-sCnc
ComponentFatty acids.omega 6
PropertySCnc
TimingPt
System (specimen)RBC.lysate
ScaleQn
ClassCHEM
Example unitsmmol/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Omega 6 fatty acids (w6), RBC.lysate

Part names

Fatty acids.omega 6SCncPtRBC.lysateQnOmega 6 fatty acids (w6)Substance ConcentrationPoint in time (spot)

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 99621-5 | HealthAssure