LOINCActiveObservation

LOINC Code 29637-6: Time last dose (Dose)

29637-6 is a LOINC code used to identify Time last dose (Dose) 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 Time last dose. It is commonly used with the system or sample type Dose.

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 Time last dose. It is commonly used with the system or sample type Dose.

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

  • Time last dose of Dose
  • Time last dose
  • Date and time; Dose med or substance; DRUG DOSES; Past; Point in time; QNT; Quan; Quant; Quantitative; Random; Time stamp; Timestamp; Tme Last Dose

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

Time last dose (Dose)Time last dose of DoseTme Last DoseTime last doseDRUGDOSETmStpPt

Frequently asked questions

Code details

Code29637-6
SystemLOINC
Display nameTime last dose (Dose)
DescriptionTime last dose
Short nameTme Last Dose
ComponentTime last dose
PropertyTmStp
TimingPt
System (specimen)Dose
ScaleQn
ClassDRUGDOSE
Example unitsh
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.03
Last changed2.73

Consumer names

Time last dose

Part names

Time last doseTmStpPtDoseQnTime 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 29637-6 | HealthAssure