Test Overview

Test Methodology

High-Performance Liquid Chromatography (HPLC)

Test Usage

Evaluation of patients who present with signs or symptoms suggestive of porphyria cutanea tarda, hereditary coproporphyria, variegate porphyria, congenital erythropoietic porphyria, erythropoietic protoporphyria, or X-linked dominant protoporphyria.

Reference Range*

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed

Tuesday, Thursday

Analytic Time

4 - 5 days

Soft Order Code


MiChart Code

Porphyrins, Feces



Porphyrins, Feces

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Laboratory Reference

Mayo FQPPS (81652)

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Specimen Requirements

Offsite Collection Instructions

Patient should be instructed to refrain from red meat and aspirin-containing medications for 3 days prior to and during specimen collection period. No barium, laxatives, or enemas may be used within 24 hours of starting the collection. Collect stool for a duration of 48, 72, or 96 hours; freeze (preferred) or refrigerate and send entire collection. Note collection duration, start date and time and end date and time on requisition. Also include a list of medications the patient is currently taking.

Normal Volume

Entire 48 - 96 hour stool collection

Minimum Volume

24 hour collection is adequate if the collection volume is approximately 100 g

Additional Information

Test sent to Mayo Medical Laboratories.

Billing Information

Fee Codes

CPT Code


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