What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCBoth

LOINC Code 77191-5: Human epididymis protein 4 EIA [Moles/Vol]

Name: LOINC Code 77191-5: Human epididymis protein 4 EIA [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:57.647Z

77191-5 is a LOINC code used to identify Human epididymis protein 4 EIA [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 Human epididymis protein 4. 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 Human epididymis protein 4. 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: DEPRECATED
Order vs observation: Both
Method: EIA

What it does not mean

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

Key facts

Deprecated Human epididymis protein 4 [Moles/volume] in Serum or Plasma by Immunoassay
Human epididymis protein 4
This term was created for, but not limited in use to, the Roche cobas HE4 Human epididymal protein 4 test kit.
Chemistry; ELFA; ELISA; Endometrial cancer; Enzyme immunoassay; HE4; IAA; Level; MEIA; Ovarian cancer; Pl; Plasma; Plsm; Point in time; PR; Prot; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; SUDS; Tumor marker; WAP four-disulfide core domain protein 2

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

Human epididymis protein 4 EIA [Moles/Vol]Deprecated Human epididymis protein 4 [Moles/volume] in Serum or Plasma by ImmunoassayDeprecated HE4 SerPl EIA-sCncHuman epididymis protein 4CHEMHuman epididymis protein 4, BloodSCnc

Frequently asked questions

Code details

Code77191-5

SystemLOINC

Display nameHuman epididymis protein 4 EIA [Moles/Vol]

DescriptionHuman epididymis protein 4

Short nameDeprecated HE4 SerPl EIA-sCnc

ComponentHuman epididymis protein 4

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodEIA

ClassCHEM

Example unitspmol/L

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.54

Consumer names

Human epididymis protein 4, Blood

Part names

Human epididymis protein 4SCncPtSer/PlasQnEIASubstance ConcentrationPoint in time (spot)Serum or PlasmaImmunoassay (EIA)

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.