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 66765-9: Albumin in pericardial fld/Albumin in Serum or Plasma (Pericard fld+S/P) [Relative ratio]

Name: LOINC Code 66765-9: Albumin in pericardial fld/Albumin in Serum or Plasma (Pericard fld+S/P) [Relative ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.213Z

66765-9 is a LOINC code used to identify Albumin in pericardial fld/Albumin in Serum or Plasma (Pericard fld+S/P) [Relative ratio] 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 Albumin.pericard fld/Albumin.SerPl. It is commonly used with the system or sample type Pericard fld+Ser/Plas.

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 Albumin.pericard fld/Albumin.SerPl. It is commonly used with the system or sample type Pericard fld+Ser/Plas.

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

Albumin in pericardial fld/Albumin in Serum or Plasma
Albumin.pericard fld/Albumin.SerPl
Alb; Alb Pcar; Chemistry; Pcar; Pericard fld+SerPl; Pericardial Fluid; Pl; Plasma; Plsm; Point in time; Protein.albumin; QNT; Quan; Quant; Quantitative; Random; Relative ratio; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

Albumin in pericardial fld/Albumin in Serum or Plasma (Pericard fld+S/P) [Relative ratio]Albumin in pericardial fld/Albumin in Serum or PlasmaAlb Pcar/SerPlAlbumin.pericard fld/Albumin.SerPlCHEMAlbumin in pericardial fld/Albumin in Serum Or Plasma, Pericardial Fluid+BloodRelRto

Frequently asked questions

Code details

Code66765-9

SystemLOINC

Display nameAlbumin in pericardial fld/Albumin in Serum or Plasma (Pericard fld+S/P) [Relative ratio]

DescriptionAlbumin.pericard fld/Albumin.SerPl

Short nameAlb Pcar/SerPl

ComponentAlbumin.pericard fld/Albumin.SerPl

PropertyRelRto

TimingPt

System (specimen)Pericard fld+Ser/Plas

ScaleQn

ClassCHEM

Example unitsRatio

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.70

Consumer names

Albumin in pericardial fld/Albumin in Serum Or Plasma, Pericardial Fluid+Blood

Part names

Albumin.pericard fld/Albumin.SerPlRelRtoPtPericard fld+Ser/PlasQnRelative RatioPoint in time (spot)Pericardial fluid and serum or 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.