Carbon Dioxide, Total

General Information

Lab Name

Carbon Dioxide, Total

Lab Code

CO2

Epic Name

Carbon Dioxide, Total

Synonyms

Bicarbonate

Interpretation

Method

Spectrophotometric

Reference Ranges

(individual methods listed below)

Default Method

Units: mEq/L
Female Male Unknown
AgeRange AgeRange AgeRange
0-22-32 0-22-32 0-22-32

Effective date: 03/01/2015

FH3 COBAS PUR 1 [F3PUR1]

Units: mEq/L
Female Male Unknown
AgeRange AgeRange AgeRange
0-22-29 0-22-29

Effective date: 12/23/2025

Guidelines

Ordering & Collection

Specimen Type

Blood

Collection

HMC and UWMC Onsite Locations

  • Preferred: 4 mL blood in LIME GREEN PST tube
  • Also Acceptable: 4 mL blood in ORANGE RST, GOLD SST, RED TOP or GREEN TOP tube
  • Pediatric: 1 Full LIME GREEN MICROTAINER
  • Unacceptable: GRAY TOP

Offsite Clinic or Other Locations

  • Preferred: 4 mL blood in GOLD SST tube
  • Also Acceptable: 4 mL blood in ORANGE RST or LIME GREEN PST, RED TOP or GREEN TOP tube
  • Pediatric: 1 Full LIME GREEN MICROTAINER
  • Unacceptable: GRAY TOP

Handling Instructions

Note:CO2 cannot be added onto a specimen more than 8 hours after the specimen is received by the laboratory.

Quantity

requested: 0.5 mL serum/plasma
minimum: 0.2 mL serum/plasma

Processing

Refrigerate serum/plasma

Sample stability 8 hours.

Performance

LIS Dept Code

Chemistry, Automated Panels (CHA)

Performing Location(s)

HMC Chemistry, Automated
206-520-4600

325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-NW Main Lab
206-668-1344

UW Medical Center – Northwest
1550 N 115th Street, A200
Seattle, WA 98133
UW-MT Chemistry, Automated
206-520-4600

Clinical Lab, Room NW220,
University of Washington Medical Center,
1959 NE Pacific street, Seattle, WA 98195
FHCC Fred Hutch Alliance Lab
206-606-1088

825 Eastlake Ave, Seattle, WA 98109

Fax: 206-606-2027
Hours of Operation: 6:00 a.m. - 10:00 p.m.

Includes satellite labs:
• SAIM - Sloan Clinic 1, 6th Floor
• FHH3 - Sloan Clinic 2, 3rd Floor
• FHH4 - Sloan Clinic 2, 4th Floor
FHCC Fred Hutch Community Lab, Evergreen Campus
425-441-2640

10240 NE 128th St
Kirkland, WA 98034

Fax: 425-441-2707
Hours of Operation: 7:30 a.m. - 5:00 p.m.
FHCC FHCC Peninsula Laboratory

19917 7th Ave NE Ste 100, Poulsbo, WA 98370-6555

Phone: 360-842-5116
Fax: 360-842-5150
Hours of Operation: 8:00 a.m. - 5:00 p.m.

Frequency

Daily

Available STAT?

Yes

Billing & Coding

CPT codes

82374

LOINC

2028-9

Interfaced Result Code

UOW3833