bloodwork
Add a Report Sign In

Bicarbonate

A carbon dioxide (CO2) blood test measures the amount of carbon dioxide in your blood. Carbon dioxide is an odorless, colorless gas. It is a waste product from metabolism, the process your body uses to make energy from food you eat.

A CO2 blood test is often part of a group of tests called an electrolyte panel, which may be part of a routine checkup. The test may also help diagnose or monitor conditions related to an electrolyte imbalance. These may include high blood pressure and diseases of the kidneys, lungs, or liver.

Source: MedlinePlus, U.S. National Library of Medicine

Normal range

25 published ranges, each from a named source
Male · 18 y+
22–29 mmol/L
Ranges from Mayo Clinic Laboratories (Pediatric Test Catalog), Mayo Clinic Laboratories (Test Catalog).

All source ranges (25)
SourceSexAgeRange
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages 23–28 mEq/L
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages 23–26 mEq/L
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages 24–28 mEq/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Female 1 y – 3 y 18–25 mmol/L
Mayo Clinic Laboratories (Test Catalog) Female 1 y – 3 y 18–25 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Female 4 y – 5 y 19–26 mmol/L
Mayo Clinic Laboratories (Test Catalog) Female 4 y – 5 y 19–26 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Female 6 y – 7 y 20–27 mmol/L
Mayo Clinic Laboratories (Test Catalog) Female 6 y – 7 y 20–27 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Female 8 y – 9 y 21–28 mmol/L
Mayo Clinic Laboratories (Test Catalog) Female 8 y – 9 y 21–28 mmol/L
Mayo Clinic Laboratories (Test Catalog) Female 10 y+ 22–29 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Female 10 y+ 22–29 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Male 1 y – 2 y 17–25 mmol/L
Mayo Clinic Laboratories (Test Catalog) Male 1 y – 2 y 17–25 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Male 3 y 18–26 mmol/L
Mayo Clinic Laboratories (Test Catalog) Male 3 y 18–26 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Male 4 y – 5 y 19–27 mmol/L
Mayo Clinic Laboratories (Test Catalog) Male 4 y – 5 y 19–27 mmol/L
Mayo Clinic Laboratories (Test Catalog) Male 6 y – 7 y 20–28 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Male 6 y – 7 y 20–28 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Male 8 y – 17 y 21–29 mmol/L
Mayo Clinic Laboratories (Test Catalog) Male 8 y – 17 y 21–29 mmol/L
Mayo Clinic Laboratories (Test Catalog) Male 18 y+ 22–29 mmol/L
Mayo Clinic Laboratories (Pediatric Test Catalog) Male 18 y+ 22–29 mmol/L

What an abnormal result can be associated with

A high result
Elevated serum bicarbonate concentration
A low result
Decreased serum bicarbonate concentration
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis: only a clinician can interpret your result in context.
details
Sample
Serum or plasma · LOINC
Part of
Electrolytes panel
Listed under
Fluid and Electrolyte Balance
Code
LOINC 1963-8 · mEq/L
Also known as
BIC, Bicarb, HCO3, SBC, SBIC
See your own Bicarbonate Add a lab report and it is drawn against your lab's range, over time. Upload a Blood Test