USC Clinical Reference Laboratory

COMPLEMENT COMPONENT 4 (C4)

METHODOLOGY

Immunologic Turbidimetry

PERFORMED

Mon. - Fri.

REPORTED

Same day

COLLECT

One 6 mL SST

TRANSPORT

1 mL serum (Min: 0.3 mL)

STABILITY

Ambient - 6 hours
Refrigerated - 24 hours
Frozen - Stable

UNACCEPTABLE CONDITIONS

N/A

REMARKS

Plasma samples not recommended.

REFERENCE RANGE

0 up to 1 mo:
8 - 30 mg/dL

1 mo:
9 - 33 mg/dL

2 mos:
9 - 37 mg/dL

3 mos:
10 - 35 mg/dL

4 mos:
10 - 49 mg/dL

5 mos:
9 - 48 mg/dL

6 mos:
12 - 55 mg/dL

7-8 mos:
13 - 48 mg/dL

9-11 mos:
16 - 51 mg/dL

1 yr:
16 - 52 mg/dL

2-4 yrs:
12 - 47 mg/dL

5-11 yrs:
13 - 52 mg/dL

12 yrs & over:
16 - 47 mg/dL

INTERPRETIVE DATA

N/A

CPT CODE(S)

86160

BILLING INFORMATION

ICD-9 (Dx) CODE INFORMATION

DATE UPDATED

10/30/07 mkh

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