Medicare OAT Home › Forums › SIBO Mastery › Trouble Shooting › Medicare OAT This topic has 1 reply, 2 voices, and was last updated 8 years, 8 months ago by DrWoeller. Viewing 1 reply thread Author Posts May 15, 2016 at 11:12 am #590 Lorraine Love Hi what codes do you use for Medicare to cover for the OAT test? thanks Lorraine May 18, 2016 at 1:07 pm #591 DrWoellerKeymaster Lorraine, I don’t know specifically as I haven’t dealt with medicare or medicare patients. Dr. Woeller Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Log in / Register