LOINCActiveObservation

LOINC Code 16400-4: Appearance (Seminal plasma)

16400-4 is a LOINC code used to identify Appearance (Seminal plasma) 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 Observation. It is commonly used with the system or sample type Semin 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 Observation. It is commonly used with the system or sample type Semin 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

  • Appearance of Seminal plasma
  • Observation
  • Appearance; Nominal; Pl; Plasma; Plsm; Point in time; Random; Seminal plasma; SPEC

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

Appearance (Seminal plasma)Appearance of Seminal plasmaAppearance Semin plasObservationSPECAppearance, Seminal PlasmaAper

Frequently asked questions

Code details

Code16400-4
SystemLOINC
Display nameAppearance (Seminal plasma)
DescriptionObservation
Short nameAppearance Semin plas
ComponentObservation
PropertyAper
TimingPt
System (specimen)Semin plas
ScaleNom
ClassSPEC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.79

Consumer names

Appearance, Seminal Plasma

Part names

ObservationAperPtSemin plasNomAppearancePoint in time (spot)Seminal 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 16400-4 | HealthAssure