LOINCActiveObservation

LOINC Code 51906-6: Collection start time (Air) [Date/time]

51906-6 is a LOINC code used to identify Collection start time (Air) [Date/time] 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 Collection start time. It is commonly used with the system or sample type Air.

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 Collection start time. It is commonly used with the system or sample type Air.

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

  • Collection of air specimen start time
  • Collection start time
  • Hi-volume air filter collection.
  • Coll; Collect; Collect Start Tme; Collected; Date and time; Point in time; QNT; Quan; Quant; Quantitative; Random; SPEC; Started; 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

Collection start time (Air) [Date/time]Collection of air specimen start timeCollect Start Tme AirCollection start timeSPECCollection start time, AirTmStp

Frequently asked questions

Code details

Code51906-6
SystemLOINC
Display nameCollection start time (Air) [Date/time]
DescriptionCollection start time
Short nameCollect Start Tme Air
ComponentCollection start time
PropertyTmStp
TimingPt
System (specimen)Air
ScaleQn
ClassSPEC
Example unitsHHMM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.70

Consumer names

Collection start time, Air

Part names

Collection start timeTmStpPtAirQnTime 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.

LOINC Code 51906-6 | HealthAssure