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.

LOINCActiveBoth

LOINC Code 63549-0: Albumin in serum - albumin in peritoneal fluid (Periton fld+S/P) [Mass conc diff]

Name: LOINC Code 63549-0: Albumin in serum - albumin in peritoneal fluid (Periton fld+S/P) [Mass conc diff]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:42.802Z

63549-0 is a LOINC code used to identify Albumin in serum - albumin in peritoneal fluid (Periton fld+S/P) [Mass conc diff] 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.serum-Albumin.periton fld. It is commonly used with the system or sample type Periton 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.serum-Albumin.periton fld. It is commonly used with the system or sample type Periton 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: Both

What it does not mean

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

Key facts

Albumin in serum - albumin in peritoneal fluid [Mass concentration difference]
Albumin.serum-Albumin.periton fld
Alb; Alb Prt; Alb Ser; albumin gradient; Albumin ser-prt fld; Ascites; Ascitic fluid; Ascitis; Chemistry; MCDiff; Periton fld+SerPl; Peritoneal fluid; Pl; Plasma; Plsm; Point in time; Protein.albumin; Prt; QNT; Quan; Quant; Quantitative; Random; SAAG; Ser; SerP; SerPl; SerPlas; Serum; Serum or plasma; serum-ascites albumin gradient; 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 serum - albumin in peritoneal fluid (Periton fld+S/P) [Mass conc diff]Albumin in serum - albumin in peritoneal fluid [Mass concentration difference]Albumin ser-prt fld-MCDiffAlbumin.serum-Albumin.periton fldCHEMAlbumin in serum - albumin in peritoneal fluid, Peritoneal Fluid+BloodMCncDiff

Frequently asked questions

Code details

Code63549-0

SystemLOINC

Display nameAlbumin in serum - albumin in peritoneal fluid (Periton fld+S/P) [Mass conc diff]

DescriptionAlbumin.serum-Albumin.periton fld

Short nameAlbumin ser-prt fld-MCDiff

ComponentAlbumin.serum-Albumin.periton fld

PropertyMCncDiff

TimingPt

System (specimen)Periton fld+Ser/Plas

ScaleQn

ClassCHEM

Example unitsg/dL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.70

Consumer names

Albumin in serum - albumin in peritoneal fluid, Peritoneal Fluid+Blood

Part names

Albumin.serum-albumin.periton fldMCncDiffPtPeriton fld+Ser/PlasQnAlbumin in serum - albumin in peritoneal fluidMass concentration differencePoint in time (spot)Peritoneal 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.