LOINCActiveObservation

LOINC Code 82788-1: Study site identifier Clinical trial protocol

82788-1 is a LOINC code used to identify Study site identifier Clinical trial protocol 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 Study site identifier. It is commonly used with the system or sample type ^Clinical trial protocol.

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 Study site identifier. It is commonly used with the system or sample type ^Clinical trial protocol.

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

  • Study site identifier Clinical trial protocol
  • Study site identifier
  • CLINTRIAL; CTP; Ident; Identifier; Nominal; Point in time; Random; Study report

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

Study site identifier Clinical trial protocolStudy site id CTPStudy site identifierCLINTRIALIDPt^Clinical trial protocol

Frequently asked questions

Code details

Code82788-1
SystemLOINC
Display nameStudy site identifier Clinical trial protocol
DescriptionStudy site identifier
Short nameStudy site id CTP
ComponentStudy site identifier
PropertyID
TimingPt
System (specimen)^Clinical trial protocol
ScaleNom
ClassCLINTRIAL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.58
Last changed2.58

Part names

Study site identifierIDPt^Clinical trial protocolNomIdentifierPoint 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 82788-1 | HealthAssure