LOINCActiveObservation

LOINC Code 35173-4: EPA [Moles/Vol]

35173-4 is a LOINC code used to identify EPA [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 Eicosapentaenoate. It is commonly used with the system or sample type Ser/Plas.

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 Eicosapentaenoate. It is commonly used with the system or sample type Ser/Plas.

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

Eicosapentaenoate (C205w3) [Moles/volume] in Serum or Plasma
Eicosapentaenoate
C205w3; Chemistry; Eicosapentaenoic acid; EPA; Icosapentaenoate; Level; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; Timnodonate; Timnodonic Acid

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

EPA [Moles/Vol]Eicosapentaenoate (C20:5w3) [Moles/volume] in Serum or PlasmaEPA SerPl-sCncEicosapentaenoateCHEMEPA, BloodSCnc

Frequently asked questions

Code details

Code35173-4
SystemLOINC
Display nameEPA [Moles/Vol]
DescriptionEicosapentaenoate
Short nameEPA SerPl-sCnc
ComponentEicosapentaenoate
PropertySCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
Example unitsumol/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.11
Last changed2.73

Consumer names

EPA, Blood

Part names

EicosapentaenoateSCncPtSer/PlasQnEicosapentaenoate (C20:5w3)Substance ConcentrationPoint in time (spot)Serum or Plasma

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 35173-4 | HealthAssure