Ms Boyd is among several health professions to make a submission to a Senate inquiry examining the government's bid to reverse the Medevac laws passed in February when the government did not have a majority in the House of Representatives.
She urged senators to reject the government's proposed repeal bill.
"Medevac law is vital to ensure that refugees and asylum seeker receive the medical care they require," she wrote in her submission.
Ms Boyd detailed a series of examples of what she said was substandard care provided to refugees and asylum seekers including patients with gastric complaints, self-harm injuries and viral infection such as tonsilitis being discharged without further investigation.
She said medical staff frequently tried to communicate with patients without interpreters and left high school students studying nursing to complete observation of patients on suicide watch.
The Australian Medical Association, the Royal Australian College of General Practitioners and the United Nations High Commissioner for Refugees have also lodged submissions to the Senate inquiry in support of maintaining the existing laws.
Since the Medevac legislation was passed, which gives doctors more say in the transfer of refugees or asylum seekers on Nauru or Manus Island to Australia for medical treatment, 110 people have been flown to mainland Australia.
Funding needed for assessment panel
Under the Medevac laws, an Independent Health Assessment Panel was established to determine which refugees and asylum seekers should be transferred to Australia for treatment.
In its submission, the AMA raised concerns about the last-minute decision not to supply any funding to support the work of the panel.
While praising the work of the clinicians appointed to the panel, the AMA said relying on their personal efforts and funding from organisations was unsustainable.
"This is extremely problematic in the long run especially if the case load should increase significantly.
"As the future of IHAP is again uncertain and, to that extent, the AMA would again urge all parties to reach agreement on a way forward."
The panel has also reviewed the state of health services available in Papua New Guinea and Nauru, and its members are planning to visit later this year.
"These are important functions central to the provision of proper and appropriate care," the AMA stated.
The committee is due to hand down its final report on 18 October.