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 49999-6: Platelet aggregation interpretation (PRP) [Interp]

Name: LOINC Code 49999-6: Platelet aggregation interpretation (PRP) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.494Z

49999-6 is a LOINC code used to identify Platelet aggregation interpretation (PRP) [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 interpretation. 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 interpretation. 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

What it does not mean

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

Key facts

Platelet aggregation interpretation in Platelet rich plasma by induced by Collagen
Platelet aggregation interpretation
Agg; Aggr; COAGULATION; Hematology; Heme; Impression; Impression/interpretation of study; Impressions; Interp; Interpret; Interpretation; Interpt; Intrp; Nominal; PA; Pl; Platelet aggr int; Platelet rich 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 interpretation (PRP) [Interp]Platelet aggregation interpretation in Platelet rich plasma by induced by CollagenPA Coll PRP NomPlatelet aggregation interpretationCOAGPlatelet aggregation interpretation, BloodImp

Frequently asked questions

Code details

Code49999-6

SystemLOINC

Display namePlatelet aggregation interpretation (PRP) [Interp]

DescriptionPlatelet aggregation interpretation

Short namePA Coll PRP Nom

ComponentPlatelet aggregation interpretation

PropertyImp

TimingPt

System (specimen)PRP

ScaleNom

MethodCollagen induced

ClassCOAG

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.82

Consumer names

Platelet aggregation interpretation, Blood

Part names

Platelet aggregation interpretationImpPtPRPNomCollagen inducedImpression/interpretation of studyPoint in time (spot)Platelet rich plasmainduced by Collagen

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.