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Test Code C5FX C5 Complement, Functional, Serum

Reporting Name

C5 Complement, Functional, S

Useful For

Diagnosis of C5 deficiency


Investigation of a patient with an undetectable total complement (CH50) level

Method Name

Automated Liposome Lysis Assay

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Serum Red

Specimen Required

Patient Preparation: Fasting preferred

Collection Container/Tube: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Immediately after drawing the specimen, place the tube on wet ice.

2. Spin down and separate serum from clot.

3. Immediately freeze specimen.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Frozen 14 days

Reject Due To


Mild OK; Gross OK


Mild OK; Gross reject


Mild OK; Gross OK


Serum gel tube

Reference Values

29-53 U/mL

Day(s) and Time(s) Performed

Monday through Saturday; Continuously with a 3 p.m. cutoff

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
C5FX C5 Complement, Functional, S 60472-8


Result ID Test Result Name Result LOINC Value
C5FX C5 Complement, Functional, S 60472-8