LOINCActiveObservation

LOINC Code 96550-9: Date of most recent lab test for condition of interest

96550-9 is a LOINC code used to identify Date of most recent lab test for condition of interest 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 Date of most recent lab test for condition of interest. 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 Date of most recent lab test for condition of interest. 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

  • Date of most recent lab test for condition of interest
  • Date latest lab test for cond of int; Disease; Disorder; PH; Point in time; Public Health; PublicHealth; QNT; Quan; Quant; Quantitative; Random; Virus

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

Date of most recent lab test for condition of interestDate latest lab test for cond of intPUBLICHEALTHDatePt^PatientQn

Frequently asked questions

Code details

Code96550-9
SystemLOINC
Display nameDate of most recent lab test for condition of interest
Short nameDate latest lab test for cond of int
ComponentDate of most recent lab test for condition of interest
PropertyDate
TimingPt
System (specimen)^Patient
ScaleQn
ClassPUBLICHEALTH
Example unitsMMDDYY
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.69
Last changed2.69

Part names

Date of most recent lab test for condition of interestDatePt^PatientQnPoint 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.