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LOINC Code 50932-3: Uroporphyrin/Total porphyrins (24H U) [Molar fraction]

50932-3 is a LOINC code used to identify Uroporphyrin/Total porphyrins (24H U) [Molar fraction] 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 Uroporphyrin/Porphyrins.total. It is commonly used with the system or sample type Urine.

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 Uroporphyrin/Porphyrins.total. It is commonly used with the system or sample type Urine.

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

  • Uroporphyrin/Porphyrins.total in 24 hour Urine
  • Uroporphyrin/Porphyrins.total
  • 1 day; 24 hours; 24HR; Chemistry; Hematology; Heme; Octacarboxyl porphyrin; Octacarboxylporphyrin; Octacarboxyphyrin; Percent; Porph; Porphyrin; QNT; Quan; Quant; Quantitative; Substance Fraction; Tot; Totl; UA; UR; Urn; Urophorph

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

Uroporphyrin/Total porphyrins (24H U) [Molar fraction]Uroporphyrin/Porphyrins.total in 24 hour UrineUropor 24h SFr UrUroporphyrin/Porphyrins.totalCHEMUroporphyrin/Total Porphyrins, UrineSFr

Frequently asked questions

Code details

Code50932-3
SystemLOINC
Display nameUroporphyrin/Total porphyrins (24H U) [Molar fraction]
DescriptionUroporphyrin/Porphyrins.total
Short nameUropor 24h SFr Ur
ComponentUroporphyrin/Porphyrins.total
PropertySFr
Timing24H
System (specimen)Urine
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.22
Last changed2.70

Consumer names

Uroporphyrin/Total Porphyrins, Urine

Part names

Uroporphyrin/Porphyrins.totalSFr24HUrineQnSubstance Fraction24 hours

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.