Test Overview
Test Methodology

Extraction and Scanning Spectrofluorometry

Test Usage

Monitoring treatment of patients with porphyria cutanea tarda.

Reference Range *

< or = 1.0 mcg/dL

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
MiChart Code
PTPN11 Gene Sequencing in Inherited Disorders
Reference Laboratory
Mayo PTP (8731)
Special Testing
Specimen Requirements
Collection Instructions

Patient should abstain from alcohol for 24 hours prior to specimen collection. Please forward a list of medications the patient is currently taking with the specimen. Collect specimen in a green top tube. Centrifuge, aliquot plasma into a plastic vial and freeze. Protect specimen from light.

Special Handling

Protect specimen from light.

Normal Volume
3 mL plasma, protected from light
Minimum Volume
1 mL plasma, protected from light
Storage Temperature
Strict frozen
Additional Information

If total porphyrins are >1.0 mcg/dL, then Porphyrins, Fractionation, Plasma (PFP) will be performed at an additional charge. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated. Test sent to Mayo Medical Laboratories.

CPT Code
Reflex CPT
NY State Approved