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 94669-9: Reaction wheal 2 day post dose control intradermal (Skin) [Diam]

Name: LOINC Code 94669-9: Reaction wheal 2 day post dose control intradermal (Skin) [Diam]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:24.122Z

94669-9 is a LOINC code used to identify Reaction wheal 2 day post dose control 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 Reaction wheal^2D post control 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 Reaction wheal^2D post control 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

Reaction wheal [Diameter] --2 day post dose control intradermal
Reaction wheal^2D post control ID
2D p control ID; After; Dermatologic; Diameter; Epidermis; Identifier; Integument; Intradermal; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; React; Rx wheal; Rx^2D p control ID; Rxn; Skin test; SKIN TESTS; Skn

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

Reaction wheal 2 day post dose control intradermal (Skin) [Diam]Reaction wheal [Diameter] --2 day post dose control intradermalRx wheal 2D p control ID DiamReaction wheal^2D post control IDCHALSKINReaction wheal 2 days after intradermal control, SkinDiam

Frequently asked questions

Code details

Code94669-9

SystemLOINC

Display nameReaction wheal 2 day post dose control intradermal (Skin) [Diam]

DescriptionReaction wheal^2D post control ID

Short nameRx wheal 2D p control ID Diam

ComponentReaction wheal^2D post control ID

PropertyDiam

TimingPt

System (specimen)Skin

ScaleQn

ClassCHALSKIN

Example unitsmm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.68

Last changed2.68

Consumer names

Reaction wheal 2 days after intradermal control, Skin

Part names

Reaction wheal^2D post control 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.