LOINCActiveObservation

LOINC Code 21027-8: Platelet aggregation (PPP) [Interp]

21027-8 is a LOINC code used to identify Platelet aggregation (PPP) [Interp] 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 PPP.

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 PPP.

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

  • Platelet aggregation [Interpretation] in Platelet poor plasma
  • Platelet aggregation
  • Agg; Aggr; COAGULATION; Hematology; Heme; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; PA; Pl; Plas; Platelet poor plasma; Platelets; Platelt; Plt; Point in time; 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 (PPP) [Interp]Platelet aggregation [Interpretation] in Platelet poor plasmaPA PPP-ImpPlatelet aggregationCOAGPlatelet Aggregation, BloodImp

Frequently asked questions

Code details

Code21027-8
SystemLOINC
Display namePlatelet aggregation (PPP) [Interp]
DescriptionPlatelet aggregation
Short namePA PPP-Imp
ComponentPlatelet aggregation
PropertyImp
TimingPt
System (specimen)PPP
ScaleNom
ClassCOAG
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.73

Consumer names

Platelet Aggregation, Blood

Part names

Platelet aggregationImpPtPPPNomImpression/interpretation of studyPoint in time (spot)Platelet poor plasma

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 21027-8 | HealthAssure