FREE RBC PROTOPORPHYRIN

Test Code

LAB1280

Quest Code

30521

CPT Codes
82657

Preferred Specimen

5 mL whole blood collected in a sodium heparin (green-top) tube

Patient Preparation
Have patient fast for 12-14 hours

Note: The patient should be off medications, if possible for at least 1 week. Water may be taken as needed. No other liquids are allowed. Patient should abstain from alcohol for 24 hours.

Instructions

Draw blood in a sodium heparin (green-top) tube and send 5 mL (pediatric 2 mL) refrigerated. Specimen cannot be frozen.

*** Draw Monday-Thursday due to specimen stability issues ***

Note: Specimen should be received at laboratory within 48 hours from draw.

Transport Container

Sodium heparin (green-top) tube

Transport Temperature

Refrigerated (cold packs)

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Anticoagulants other than heparin • Warm reject (cold acceptable)

Methodology
Incubation of erythrocytes and comparison of Uroporphyrinogen I and Uroporphyrinogen III formed

Setup Schedule

Mon-Fri

Report Available

8-14 days

Reference Range

See Laboratory Report

Clinical Significance

Useful for iagnosis of congenital erythropoietic porphyria ("congential erythropoietic porphyria").

Performing Laboratory

Mayo Clinical Laboratories

200 1st Street SW

Rochester, MN 55905-0001

Last Updated: September 8, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.