LOINCActiveObservation

LOINC Code 77738-3: Line Flush [Type]

77738-3 is a LOINC code used to identify Line Flush [Type] 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 Flush. It is commonly used with the system or sample type Line.

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 Flush. It is commonly used with the system or sample type Line.

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

  • Line Flush [Type]
  • Flush
  • Describes the type of flush used to flush an intravascular line prior to the collection of a blood specimen from that line.
  • CLIN; Ln; Nominal; Point in time; Random; Typ

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

Line Flush [Type]Line FlushFlushCLINTypePtLine

Frequently asked questions

Code details

Code77738-3
SystemLOINC
Display nameLine Flush [Type]
DescriptionFlush
Short nameLine Flush
ComponentFlush
PropertyType
TimingPt
System (specimen)Line
ScaleNom
ClassCLIN
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.52

Part names

FlushTypePtLineNomPoint in time (spot)Line specimen

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 77738-3 | HealthAssure