LOINCActive

LOINC Code 59784-9: Disease with presumed immunity

59784-9 is a LOINC code used to identify Disease with presumed immunity 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 Disease with presumed immunity. 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 Disease with presumed immunity. 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

What it does not mean

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

Key facts

Disease with presumed immunity
Indicates the disease(s)/condition(s) to which is person is judged to be immune. There are two acceptable types of evidenced used to determine that a person no longer needs vaccination because they are presumed to be immune(1) lab confirmation of immunity, or (2) physician diagnosed history of disease.
Dis; Diseases; Dz; Finding; Findings; Nominal; Point in time; 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

Disease with presumed immunityVACCINFindPt^PatientNomFinding

Frequently asked questions

Code details

Code59784-9
SystemLOINC
Display nameDisease with presumed immunity
Short nameDisease with presumed immunity
ComponentDisease with presumed immunity
PropertyFind
TimingPt
System (specimen)^Patient
ScaleNom
ClassVACCIN
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.32
Last changed2.73

Part names

Disease with presumed immunityFindPt^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.

LOINC Code 59784-9 | HealthAssure