LOINCActiveObservation

LOINC Code 75505-8: Diseases with serologic evidence of immunity

75505-8 is a LOINC code used to identify Diseases with serologic evidence of 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 Diseases with serologic evidence of 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 Diseases with serologic evidence of 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
  • Order vs observation: Observation

What it does not mean

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

Key facts

Diseases with serologic evidence of immunity
The disease(s) for which the patient has serologic evidence of protection against. The results may be reported using SNOMED CT codes (e.g. Hepatitis A immune (finding), SCTID278971009)
Diseases w sero evidence of immunity; 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

Diseases with serologic evidence of immunityDiseases w sero evidence of immunityVACCINFindPt^PatientNom

Frequently asked questions

Code details

Code75505-8
SystemLOINC
Display nameDiseases with serologic evidence of immunity
Short nameDiseases w sero evidence of immunity
ComponentDiseases with serologic evidence of immunity
PropertyFind
TimingPt
System (specimen)^Patient
ScaleNom
ClassVACCIN
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.50
Last changed2.61

Part names

Diseases with serologic evidence of 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 75505-8 | HealthAssure