Dubbed as Dr. Death, he was convicted on Tuesday for violations of manslaughter againts Mervyn Morris, Gerardus Kemps, and James Phillips.
The Brisbane Supreme Court jury also found him guilty for causing grievous bodily harm to Ian Vowles.
The charges are linked to Patel's time as director of surgery at Bundaberg Base Hospital in 2003 to 2005.
Mr. Payal will face a maximum sentence of life in jail on the manslaughter cases.
Michael Byrne, a lawyer representing Patel, asked for bail pending the outcome of the sentencing hearing but was denied by Justice John Byrne.
The trial went on for 14 weeks and almost 50 hours of jury deliberations over six-and-a-half days.
Patel's case may be presented to the Court of Appeals, where it is expected to be asked on whether the Patel's verdict was permitted by law after a ruling by Justice Byrne.
Patel is said to face court today over an additional grievous bodily harm charge and eight fraud charges. These are also related during his director post at Bundaberg.
As of press time, there has been no scheduled hearing on any of these charges.
Beryl Crosby, president of the Bundaberg Patient Support Group, todl media she will not be present in court today to witness the sentencing of Patel. She added that hearing the four guilty verdicts was enough for her.