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26126 C4A Level by RIA (FC4A)

C4A Level by RIA (FC4A)
Test Code: FC4ASO
Synonyms/Keywords

​C4 anaphylatoxin

C4a Level Complement

C4a Level

C4ades Arg Level

Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​No ​Plasma ​EDTA Lavender Top Tube (LTT) ​1 mL ​0.5 mL
Collection Processing Instructions
Mix well, centrifuge at ambient temperature within one half hour of draw (preferably immediately after venipuncture), and freeze immediately on dry ice or at -70 C. Send 1 mL of EDTA plasma frozen in plastic vial. Complete National Jewish Complement request form and submit with specimen.
Specimen Stability Information
Specimen Type Temperature Time
​Plasma ​Frozen ​365 days
Rejection Criteria
Plasma gel tubes
​Gross hemolysis
​Thawed specimens
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Labs forwards to National Jewish Health ​1st and 3rd Thursday of the month ​23-44 days ​Radioimmunoassay (RIA)
Reference Lab
Test Information

This test should be regarded as 'Research Use Only'. This test has not been cleared or approved by the U.S. Food and Drug Administration. It may not be covered by insurance and providers need to inform all patients of this prior to ordering. 

For Medicare patients, an Advanced Beneficiary notice (ABN) is required; for Medicaid patients, a Noncovered Services Waiver is required, and for commercial payers, prior authorization should be obtained.   ​​

Reference Range Information
Performing Location Reference Range
​Mayo Medical Labs forwards to National Jewish Health ​0 - 2830 ng/mL
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​86160 ​1
Classification

This test should be regarded as 'Research Use Only'. This test has not been cleared or approved by the U.S. Food and Drug Administration. It may not be covered by insurance and providers need to inform all patients of this prior to ordering. 

For Medicare patients, an Advanced Beneficiary notice (ABN) is required; for Medicaid patients, a Noncovered Services Waiver is required, and for commercial payers, prior authorization should be obtained.   ​​

Synonyms/Keywords

​C4 anaphylatoxin

C4a Level Complement

C4a Level

C4ades Arg Level

Ordering Applications
Ordering Application Description
​Centricity C4a Level (FC4A)
​Cerner C4a Level (FC4A)
​COM C4a Level (FC4A)
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​No ​Plasma ​EDTA Lavender Top Tube (LTT) ​1 mL ​0.5 mL
Collection Processing
Mix well, centrifuge at ambient temperature within one half hour of draw (preferably immediately after venipuncture), and freeze immediately on dry ice or at -70 C. Send 1 mL of EDTA plasma frozen in plastic vial. Complete National Jewish Complement request form and submit with specimen.
Specimen Stability Information
Specimen Type Temperature Time
​Plasma ​Frozen ​365 days
Rejection Criteria
Plasma gel tubes
​Gross hemolysis
​Thawed specimens
Reference Range Information
Performing Location Reference Range
​Mayo Medical Labs forwards to National Jewish Health ​0 - 2830 ng/mL
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Labs forwards to National Jewish Health ​1st and 3rd Thursday of the month ​23-44 days ​Radioimmunoassay (RIA)
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​86160 ​1
Classification

This test should be regarded as 'Research Use Only'. This test has not been cleared or approved by the U.S. Food and Drug Administration. It may not be covered by insurance and providers need to inform all patients of this prior to ordering. 

For Medicare patients, an Advanced Beneficiary notice (ABN) is required; for Medicaid patients, a Noncovered Services Waiver is required, and for commercial payers, prior authorization should be obtained.   ​​

For most current information refer to the Marshfield Laboratory online reference manual.