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 23506-9: T. foetus reaction wheal post 0.1 mL tricin intradermal (Skin) [Diam]

Name: LOINC Code 23506-9: T. foetus reaction wheal post 0.1 mL tricin intradermal (Skin) [Diam]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:30.732Z

23506-9 is a LOINC code used to identify T. foetus reaction wheal post 0.1 mL tricin intradermal (Skin) [Diam] 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 Tritrichomonas foetus reaction wheal^post 0.1 mL tricin ID. It is commonly used with the system or sample type Skin.

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 Tritrichomonas foetus reaction wheal^post 0.1 mL tricin ID. It is commonly used with the system or sample type Skin.

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

Tritrichomonas foetus reaction wheal [Diameter] --post 0.1 mL tricin intradermal
Tritrichomonas foetus reaction wheal^post 0.1 mL tricin ID
After; Bovine venereal trichomonosis; Dermatologic; Diameter; Epidermis; Identifier; Integument; Intradermal; p Tricin; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; React; Rx wheal; Rxn; Skin test; SKIN TESTS; Skn; T foet; T foetus; Vet; Veterinary

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

T. foetus reaction wheal post 0.1 mL tricin intradermal (Skin) [Diam]Tritrichomonas foetus reaction wheal [Diameter] --post 0.1 mL tricin intradermalWheal p Tricin DiamTritrichomonas foetus reaction wheal^post 0.1 mL tricin IDCHALSKINTritrichomonas foetus reaction wheal after 0.1 mL Tricin Intradermal, SkinDiam

Frequently asked questions

Code details

Code23506-9

SystemLOINC

Display nameT. foetus reaction wheal post 0.1 mL tricin intradermal (Skin) [Diam]

DescriptionTritrichomonas foetus reaction wheal^post 0.1 mL tricin ID

Short nameWheal p Tricin Diam

ComponentTritrichomonas foetus reaction wheal^post 0.1 mL tricin ID

PropertyDiam

TimingPt

System (specimen)Skin

ScaleQn

ClassCHALSKIN

Example unitsmm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.42

Consumer names

Tritrichomonas foetus reaction wheal after 0.1 mL Tricin Intradermal, Skin

Part names

Tritrichomonas foetus reaction wheal^post 0.1 mL tricin IDDiamPtSkinQnDiameterPoint 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.