I wouldn't rely on WAT (wildabouttrial) to post complete archived versions of the trial proceedings. I have just spent the better part of an hour (or more) searching through Day 4 (Thursday, March 6) of the trial, and Dr. Stipp's testimony during direct examination by prosecutor Nel is apparently missing.
I finally found what I was looking for on youtube.
Oscar Pistorius Trial: Thursday 6 March 2014, Session 2 - YouTube
After Dr. Stipp rendered what medical assistance he could and realized he couldn't do anything for Reeva because her injuries were too serious, he went outside. He said Mr. Stander was outside and he asked him "Is the ambulance was on its way?", and Mr. Stander said, No, he hadn't called the ambulance yet.
So Dr. Stipp called a hospital's ER and asked them to send an ambulance & was told by them that he needed to call an ambulance service, which Mr. Stander then did, and then Stander handed Stipp the phone & Stipp spoke with the dispatcher, described what happened, the nature of the injuries, and an ambulance was sent out.
Dr. Stipp stated that he was unaware that it was OP's house, and also said that Mr. Stander referred to OP as "Oscar".
While outside waiting for the ambulance to arrive, Dr. Stipp was at one point talking to Mr. Stander, and he stated that at one stage Mrs. Stander arrived. He said Mr. Stander's daughter was also on the scene at that time. They were all outside talking, but Dr. Stipp doesn't remember the specifics of what they were talking about, only that they were concerned about what happened, and Dr. Stipp said that Mrs. Stander said she hoped "This doesn't get out in the papers".
The ambulance arrived a short while after that.
Dr. Stipp said to Stander "I'm of no use further to anyone". They exchanged phone numbers; Dr. Stipp got in his car and drove back home.
Dr. Stipp went on to testify that about 4:17 a.m. that same morning his phone rang. It was Mr. Stander notifying him that OP's lawyer may be calling him.