LOINC Code 33618-0: Coproporphyrin 3/Coproporphyrin 1 (24H Stl) [Mass ratio]

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 Coproporphyrin 3/Coproporphyrin 1. 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: Observation

What it does not mean

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

Key facts

• Coproporphyrin 3/Coproporphyrin 1 [Mass Ratio] in 24 hour Stool
• Coproporphyrin 3/Coproporphyrin 1
• 1 day; 24 hours; 24HR; Bowel movement; Chemistry; Copro; Copro1; Copro3; Coproporph; Coproporphyrin I; Coproporphyrin III; Coproporphyrins; Faecal; Faeces; Fecal; Feces; i; III; Mass concentration ratio; Mass ratio; MCRto; QNT; Quan; Quant; Quantitative; Stl; Stool = Fecal; Tetracarboxyl porphyrin; Tetracarboxylporphyrin; Tetracarboxylporphyrins; Tetracarboxyporphyrin

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

Frequently asked questions