What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 33670-1: Platelet aggregation (PRP) [Time]

Name: LOINC Code 33670-1: Platelet aggregation (PRP) [Time]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:21.183Z

33670-1 is a LOINC code used to identify Platelet aggregation (PRP) [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 Platelet aggregation. It is commonly used with the system or sample type PRP.

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 Platelet aggregation. It is commonly used with the system or sample type PRP.

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
Method: Collagen induced lag.high dose

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Platelet aggregation [Time] in Platelet rich plasma by collagen induced lag High dose
Platelet aggregation
This is the lag phase between addition of collagen and platelet aggregation
Agg; Aggr; COAGULATION; Coll Lag time hi dose PRP; Hematology; Heme; PA; Pl; Platelet rich plasma; Platelets; Platelt; Plt; Point in time; QNT; Quan; Quant; Quantitative; Random; Thrombocyte; Thrombocytes

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

Platelet aggregation (PRP) [Time]Platelet aggregation [Time] in Platelet rich plasma by collagen induced lag High dosePA PRP Coll Lag time hi dose PRPPlatelet aggregationCOAGPlatelet Aggregation, BloodTime

Frequently asked questions

Code details

Code33670-1

SystemLOINC

Display namePlatelet aggregation (PRP) [Time]

DescriptionPlatelet aggregation

Short namePA PRP Coll Lag time hi dose PRP

ComponentPlatelet aggregation

PropertyTime

TimingPt

System (specimen)PRP

ScaleQn

MethodCollagen induced lag.high dose

ClassCOAG

Example unitss

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.82

Consumer names

Platelet Aggregation, Blood

Part names

Platelet aggregationTimePtPRPQnCollagen induced lag.high doseTime (e.g. seconds)Point in time (spot)Platelet rich plasmacollagen induced lag High dose

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.