The descriptors for both CPT® codes 82803 and 82805 begin with the word “gases.” Does this mean there must be two or more blood gases measured?


These codes may be assigned any time you measure and report one or more of the associated blood gases.

82803 Gases, blood, any combination of pH, pCO2, pO2 CO2, HCO3 (including calculated 02 saturation)
82805 with O2 saturation, by direct measurement, except pulse oximetry

When blood gas assays include O2 saturation by calculated result, assign CPT 82803 rather than 82805. When they include O2 saturation by direct measurement, assign CPT 82805 rather than 82803. Note too that it is not permissible to bill for individual components of the blood gas in addition to code 82803 or 82805.

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