LOINCActiveObservation

LOINC Code 33671-9: Platelet aggregation (PRP control) [Time]

33671-9 is a LOINC code used to identify Platelet aggregation (PRP control) [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^Control.

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^Control.

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 Control 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; Contrl; Hematology; Heme; Normal; 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 control) [Time]Platelet aggregation [Time] in Control Platelet rich plasma by collagen induced lag High dosePA Cont PRP Coll Lag time hi dose PRPPlatelet aggregationCOAGPlatelet Aggregation, control BloodTime

Frequently asked questions

Code details

Code33671-9
SystemLOINC
Display namePlatelet aggregation (PRP control) [Time]
DescriptionPlatelet aggregation
Short namePA Cont PRP Coll Lag time hi dose PRP
ComponentPlatelet aggregation
PropertyTime
TimingPt
System (specimen)PRP^Control
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, control Blood

Part names

Platelet aggregationTimePtPRP^ControlQnCollagen induced lag.high doseTime (e.g. seconds)Point in time (spot)Platelet rich plasma^Controlcollagen 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.

LOINC Code 33671-9 | HealthAssure