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 30966-6: Pre-existing physician-diagnosed allergies, birth defects, medical conditions

Name: LOINC Code 30966-6: Pre-existing physician-diagnosed allergies, birth defects, medical conditions
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:17.663Z

30966-6 is a LOINC code used to identify Pre-existing physician-diagnosed allergies, birth defects, medical conditions 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 Pre-existing physician-diagnosed allergies, birth defects, medical conditions. 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 Pre-existing physician-diagnosed allergies, birth defects, medical conditions. 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: ACTIVE
Order vs observation: Observation

What it does not mean

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

Key facts

Pre-existing physician-diagnosed allergies, birth defects, medical conditions
Before; Finding; Findings; Nominal; Point in time; Pre-existing conditions; Random; VACCINE

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

Pre-existing physician-diagnosed allergies, birth defects, medical conditionsPre-existing conditionsVACCINFindPt^PatientNom

Frequently asked questions

Code details

Code30966-6

SystemLOINC

Display namePre-existing physician-diagnosed allergies, birth defects, medical conditions

Short namePre-existing conditions

ComponentPre-existing physician-diagnosed allergies, birth defects, medical conditions

PropertyFind

TimingPt

System (specimen)^Patient

ScaleNom

ClassVACCIN

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.04

Last changed2.27

Part names

Pre-existing physician-diagnosed allergies, birth defects, medical conditionsFindPt^PatientNomFindingPoint 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.