CARBON-LABELLED UREA BREATH TEST using oral C-13 or C-14 urea, performed by a specialist or consultant physician, including the measurement of exhaled 13CO2 or 14CO2, for either:- (a)the confirmation of Helicobacter pylori colonisation, OR (b)the monitoring of the success of eradication of Helicobacter pylori in patients with peptic ulcer disease. not being a service to which 66900 applies