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 48639-9: Urea nitrogen post dialysis (BldP) [Mass/Vol]

Name: LOINC Code 48639-9: Urea nitrogen post dialysis (BldP) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

48639-9 is a LOINC code used to identify Urea nitrogen post dialysis (BldP) [Mass/Vol] 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 Urea nitrogen^post dialysis. It is commonly used with the system or sample type BldP.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Urea nitrogen^post dialysis. It is commonly used with the system or sample type BldP.

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

Urea nitrogen [Mass/volume] in Peripheral blood --post dialysis
Urea nitrogen^post dialysis
After; Blood - peripheral; Blood urea nitrogen; Chemistry; Dialy; Kidney; Level; Mass concentration; N; N2; Nephrology; Nit; p dialysis; Peripheral Bld; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; Renal; UN

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Urea nitrogen post dialysis (BldP) [Mass/Vol] (48639-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Urea nitrogen post dialysis (BldP) [Mass/Vol]Urea nitrogen [Mass/volume] in Peripheral blood --post dialysisBUN p dialysis BldP-mCncUrea nitrogen^post dialysisCHEMUrea Nitrogen (BUN) after Dialysis, BloodMCnc

Frequently asked questions

Code details

Code48639-9

SystemLOINC

Display nameUrea nitrogen post dialysis (BldP) [Mass/Vol]

DescriptionUrea nitrogen^post dialysis

Short nameBUN p dialysis BldP-mCnc

ComponentUrea nitrogen^post dialysis

PropertyMCnc

TimingPt

System (specimen)BldP

ScaleQn

ClassCHEM

Example unitsmg/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.21

Last changed2.42

Consumer names

Urea Nitrogen (BUN) after Dialysis, Blood

Part names

Urea nitrogen^post dialysisMCncPtBldPQnMass ConcentrationPoint in time (spot)Blood peripheral

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.