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LOINC Code 74835-0: Porphyrin fractions panel (Stl) [Molar fraction]

74835-0 is a LOINC code used to identify Porphyrin fractions panel (Stl) [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 Porphyrin fractions panel. It is commonly used with the system or sample type Stool.

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 Porphyrin fractions panel. It is commonly used with the system or sample type Stool.

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: Order
  • Panel type: Panel

What it does not mean

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

Key facts

Porphyrin fractions panel - Stool
Porphyrin fractions panel
Determination of porphyrin profile in stool is performed to evaluate porphyria. Total fecal porphyrins are markedly increased especially in active HCP (Hereditary Coproporphyria) and VP (Variegate Porphyria) and to a lesser extent in PCT (Porphyria Cutanea Tarda) and EPP (Erythropoietic Protoporphyria). Porphyrins with 2-4 carboxyl groups generally predominate in feces. As with urine, it is most useful to measure the total amount of porphyrins in a fecal sample. If increased, then the laboratory may determine which porphyrins predominate to identify the presence and nature of the porphyrin defect. A summary of the different porphyria disorders, the genes where mutations occur and the associated symptoms is given inhttp://www.porphyria-europe.com/02-for-healthcare/the-porphyrias.asp.
Bowel movement; Chemistry; Faecal; Faeces; Fecal; Feces; Frac; Fract; Fraction; Fractionated; Fractionation; Pan; PANEL.CHEMISTRY; Panl; Percent; Pnl; Point in time; Porphyrin Fract Pnl; Random; Stl; Stool = Fecal; Substance Fraction

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

Porphyrin fractions panel (Stl) [Molar fraction]Porphyrin fractions panel - StoolPorphyrin Fract Pnl SFr StlPorphyrin fractions panelPANEL.CHEMPorphyrin fractions panel, StoolSFr

Frequently asked questions

Code details

Code74835-0
SystemLOINC
Display namePorphyrin fractions panel (Stl) [Molar fraction]
DescriptionPorphyrin fractions panel
Short namePorphyrin Fract Pnl SFr Stl
ComponentPorphyrin fractions panel
PropertySFr
TimingPt
System (specimen)Stool
Scale-
ClassPANEL.CHEM
StatusACTIVE
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.48
Last changed2.48

Consumer names

Porphyrin fractions panel, Stool

Part names

Porphyrin fractions panelSFrPtStool-Substance FractionPoint in time (spot)

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.