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.

LOINC

LOINC Code 66546-3: Has a dermatologist told you that you have pustular psoriasis [PhenX]

Name: LOINC Code 66546-3: Has a dermatologist told you that you have pustular psoriasis [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.210Z

66546-3 is a LOINC code used to identify Has a dermatologist told you that you have pustular psoriasis [PhenX] 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 Has a dermatologist told you that you have pustular psoriasis. It is commonly used with the system or sample type ^Patient.

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 Has a dermatologist told you that you have pustular psoriasis. It is commonly used with the system or sample type ^Patient.

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: TRIAL
Method: PhenX

What it does not mean

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

Key facts

Has a dermatologist told you that you have pustular psoriasis [PhenX]
Has a dermatologist told you that you have pustular psoriasis
Derm dx psoriasis; Finding; Findings; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen

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

Has a dermatologist told you that you have pustular psoriasis [PhenX]Derm dx psoriasis PhenXHas a dermatologist told you that you have pustular psoriasisPHENXFindPt^Patient

Frequently asked questions

Code details

Code66546-3

SystemLOINC

Display nameHas a dermatologist told you that you have pustular psoriasis [PhenX]

DescriptionHas a dermatologist told you that you have pustular psoriasis

Short nameDerm dx psoriasis PhenX

ComponentHas a dermatologist told you that you have pustular psoriasis

PropertyFind

TimingPt

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.65

Part names

Has a dermatologist told you that you have pustular psoriasisFindPt^PatientOrdPhenXFindingPoint 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.