LOINCActiveObservation

LOINC Code 104101-1: Hospital admission timestamp

104101-1 is a LOINC code used to identify Hospital admission timestamp 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 Hospital admission timestamp. 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 Hospital admission timestamp. 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

  • Hospital admission timestamp
  • ADMIN; ADMIN.PATIENT; ADMIN.PT.DEMOG; Date and time; Hosp; Hospital admis timestamp; Point in time; QNT; Quan; Quant; Quantitative; Random; Time stamp; Timestamp

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

Hospital admission timestampHospital admis timestampADMIN.PATIENT.DEMOGTmStpPt^PatientQn

Frequently asked questions

Code details

Code104101-1
SystemLOINC
Display nameHospital admission timestamp
Short nameHospital admis timestamp
ComponentHospital admission timestamp
PropertyTmStp
TimingPt
System (specimen)^Patient
ScaleQn
ClassADMIN.PATIENT.DEMOG
Example unitsTmStp
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.77
Last changed2.77

Part names

Hospital admission timestampTmStpPt^PatientQnTime Stamp (Date and Time)Point 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.