LOINCActiveBoth

LOINC Code 88998-0: EPA+DHA/Fatty acids.C14-C24 [Molar fraction]

88998-0 is a LOINC code used to identify EPA+DHA/Fatty acids.C14-C24 [Molar fraction] 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+Docosahexaenoate/Fatty acids.C14-C24. It is commonly used with the system or sample type Ser/Plas.

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 Eicosapentaenoate+Docosahexaenoate/Fatty acids.C14-C24. 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: Both

What it does not mean

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

Key facts

Omega-3 (EPA+DHA) index in Serum or Plasma
Eicosapentaenoate+Docosahexaenoate/Fatty acids.C14-C24
The omega-3 index, defined as eicosapentaenoate (EPA)+ docosahexaenoate (DHA)/Fatty acids.C14-C24, is a clinically useful measurement for evaluating blood levels of EPA and DHA. There are many health benefits from maintaining a good level of omega-3 fatty acids including reduced inflammation, risk of heart disease, cancer, arthritis, and many more. Deficiency in omega-3 fatty acids can result in fatigue, poor memory, dry skin, heart problems, mood swings, and poor circulation.[https//www.umm.edu/health/medical/altmed/supplement/omega3-fatty-acids] There have been a number of clinical trials to determine the effect of omega-3 supplementation based on a 1g/day dose of EPA, which successfully increased the total omega-3 level to >5% for 84% of the study participants. The remaining 16% had levels below 5%, which is the threshold at which significant reduction in sudden coronary death reduction is evident. The variability in the blood levels of omega-3 in patients who received the same supplemental dose of omega-3 has been attributed to genetic differences in fatty acid metabolism, body weight, baseline omega-3 level, age, gender, and physical activity.[PMID: 25285179]
Acd; Acid; C205w3; C22:6w3; Cervonate; Cervonic acid; Chemistry; DHA; Docosahexaenoic acid; Eicosapentaenoic acid; EPA; EPA+DHA; Fatty acid; Icosapentaenoate; Lipid; Percent; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance fraction; 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+DHA/Fatty acids.C14-C24 [Molar fraction]Omega-3 (EPA+DHA) index in Serum or PlasmaOmega-3 index SFr SerPlEicosapentaenoate+Docosahexaenoate/Fatty acids.C14-C24CHEMEPA+DHA/Fatty Acids.C14-C24, BloodSFr

Frequently asked questions

Code details

Code88998-0
SystemLOINC
Display nameEPA+DHA/Fatty acids.C14-C24 [Molar fraction]
DescriptionEicosapentaenoate+Docosahexaenoate/Fatty acids.C14-C24
Short nameOmega-3 index SFr SerPl
ComponentEicosapentaenoate+Docosahexaenoate/Fatty acids.C14-C24
PropertySFr
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.64
Last changed2.73

Consumer names

EPA+DHA/Fatty Acids.C14-C24, Blood

Part names

Eicosapentaenoate+Docosahexaenoate/Fatty acids.C14-C24SFrPtSer/PlasQnSubstance FractionPoint 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 88998-0 | HealthAssure