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.

LOINCActiveObservation

LOINC Code 40691-8: Specimen volume post washing (Sem)

Name: LOINC Code 40691-8: Specimen volume post washing (Sem)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.146Z

40691-8 is a LOINC code used to identify Specimen volume post washing (Sem) 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 Specimen volume^post washing. It is commonly used with the system or sample type Semen.

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 Specimen volume^post washing. It is commonly used with the system or sample type Semen.

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

Volume of Semen--post washing
Specimen volume^post washing
After; Ejaculate; FERTILITY TESTING; Genitourinary; GU; p Wash; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; Sem; Seminal fluid; Smn; SMPLS; Spec; URO; Urology; Vol; Volume

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

Specimen volume post washing (Sem)Volume of Semen--post washingSpecimen vol p Wash SmnSpecimen volume^post washingFERTSpecimen volume after Washing, SemenVol

Frequently asked questions

Code details

Code40691-8

SystemLOINC

Display nameSpecimen volume post washing (Sem)

DescriptionSpecimen volume^post washing

Short nameSpecimen vol p Wash Smn

ComponentSpecimen volume^post washing

PropertyVol

TimingPt

System (specimen)Semen

ScaleQn

ClassFERT

Example unitsmL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.42

Consumer names

Specimen volume after Washing, Semen

Part names

Specimen volume^post washingVolPtSemenQnVolumePoint 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.