LOINCActiveBoth

LOINC Code 18476-2: Uroporphyrinogen decarboxylase Ql (RBC)

18476-2 is a LOINC code used to identify Uroporphyrinogen decarboxylase Ql (RBC) 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 Uroporphyrinogen decarboxylase. It is commonly used with the system or sample type RBC.

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 Uroporphyrinogen decarboxylase. It is commonly used with the system or sample type RBC.

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

  • Uroporphyrinogen decarboxylase [Presence] in Red Blood Cells
  • Uroporphyrinogen decarboxylase
  • Chemistry; Erythrocytes; Hematology; Heme; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Red blood cells; Red blood corpusles; Screen; Upg D; UPGD; URO; URO-D; Urophorph; Uroporhngn; Uroporphrg

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

Uroporphyrinogen decarboxylase Ql (RBC)Uroporphyrinogen decarboxylase [Presence] in Red Blood CellsURO-D RBC QlUroporphyrinogen decarboxylaseCHEMUroporphyrinogen decarboxylase, Red blood cellsPrThr

Frequently asked questions

Code details

Code18476-2
SystemLOINC
Display nameUroporphyrinogen decarboxylase Ql (RBC)
DescriptionUroporphyrinogen decarboxylase
Short nameURO-D RBC Ql
ComponentUroporphyrinogen decarboxylase
PropertyPrThr
TimingPt
System (specimen)RBC
ScaleOrd
ClassCHEM
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Uroporphyrinogen decarboxylase, Red blood cells

Part names

Uroporphyrinogen decarboxylasePrThrPtRBCOrdPresence or ThresholdPoint in time (spot)Red Blood Cells

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 18476-2 | HealthAssure