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Test Code C5AG C5 Complement, Antigen, Serum

Reporting Name

C5 Complement, Antigen, S

Useful For

Diagnosis of C5 deficiency


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

Method Name


Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required

Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Fasting

2. Spin down and separate serum from clot.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Frozen (preferred) 60 days
  Ambient  7 days
  Refrigerated  7 days

Reject Due To


Mild OK; Gross OK


Mild OK; Gross reject


Mild OK; Gross OK



Reference Values

10.6-26.3 mg/dL

Day(s) and Time(s) Performed

Monday through Saturday; Continuous 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
C5AG C5 Complement, Antigen, S 4505-4


Result ID Test Result Name Result LOINC Value
C5AG C5 Complement, Antigen, S 4505-4