Yes essentially. Some have printed it out others have shown on the phone. The IO has the information on their screen anyway. Just check before you go you have the 180 day stamp
You are more than welcome not to do your 90 day report, however be prepared to pay the fine for not doing so if you ever need to visit immigration in country
Try Mission Hospital Dr Nick, he is American but lived here for 20+ years. Always been great. Just book an appointment with him (about 700bt ) and tell him what you need I'm sure he would be happy to help