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Test Code C1Q Complement C1q, Serum

Additional Codes

Epic Ordering Code LAB3041442
NBS code LBC13308
Service code 36802 

Reporting Name

Complement C1q, S

Specimen Type

Serum


Specimen Required


Patient Preparation:

Fasting: 12 hours, preferred but not required

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial


National University Hospital-Singapore Note:

NUH Outreach Laboratories:
Specimen Requirements
Submit only one of the following immediately:
Preferred: Gold Top
Acceptable: Red Top
Fasting: 12 hours, preferred but not required
Processing Requirements
Centrifuge and aliquot serum into a plastic vial.
Specimen type: Serum
Volume: 1 mL
Storage/transport requirements: Refrigerated

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  21 days

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Method Name

Nephelometry

Day(s) Performed

Monday through Friday

Report Available

2 to 5 days
National University Hospital-Singapore Note:

Please note that this is a referral test requiring transport to the external testing facility and an additional 3-5 days is required.

Reference Values

12-22 mg/dL

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Assessment of an undetectable total complement level

 

Diagnosing congenital C1 (first component of complement) deficiency

 

Diagnosing acquired deficiency of C1 inhibitor

CPT Code Information

86160

LOINC Code Information

Test ID Test Order Name Order LOINC Value
C1Q Complement C1q, S 4478-4

 

Result ID Test Result Name Result LOINC Value
C1Q Complement C1q, S 4478-4

Secondary ID

8851

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.
National University Hospital-Singapore Additional Information:

Last updated 06/07/2026