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HelpTest Code CRBXQ Carboxyhemoglobin, Blood
Specimen Required
One Full Tube of whole blood. Keep tube closed.
Specimen Minimum Volume
0.5 mL
Specimen Stability
Room temperature: 5 days Refrigerated: 10 days Frozen: Unacceptable
Rejection Due To
Fluoride oxalate (gray-top) tube • Grossly clotted
Report Available
Next day
Method Name
Spectrophotometry (SP)
Collection Container / Tube
Preferred: EDTA (Lavendar Top)
Other Acceptable Container: Sodium or lithium heparin (green-top),
or sodium fluoride (gray-top) tube
Transport / Storage Conditions
Room temperature
Special Instructions
After blood collection, keep tube closed
Reference Values
Non-Smoker <2 % of total Hgb
Average Smoker 4-5 % of total Hgb
Heavy Smoker 8-12 % of total Hgb
Day(s) Performed
Daily nights
CPT Codes
82375
Alias/See Also
LAB13122