In This Section

Available Tests

  • Carboxyhemoglobin (COHb)

Carboxyhemoglobin (COHb)

Specimen Type
Test ID   LAB56
EPIC Order
CPT Code(s)   82375
Group/Individual Test   Individual
Laboratory   Core Laboratory
Tube Station   31
Specimen Routine: 1 mL blood in 3cc Syringe w/lyophilized Heparin in BG Kit, SafePICO syringe, or Green top tube;  See Important Comments
  micro: 0.5 mL in TB syringe w/lypholized heparin in BG kit.
Availability Routine: 24 Hours/Day
  STAT: Yes
    10 minutes
Reference Range Normal: See Table Below
  Critical: >20%
  • Deliver Immediately.
  • Samples should be delivered to the laboratory for testing within 30 minutes of collection.
  • Syringes with needles attached will NOT be accepted.

Reference Ranges: Caroboxyhemoglobin (effective 2/16/2005)

Non-Smoker Avg. Smoker Heavy Smoker
0.0-1.5% 4-5% 6-8%

Reviewed by ivette_marrero on January 30, 2017

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514