The second death of an Aboriginal woman in WA's Bandyup prison in under five weeks has sparked further calls for urgent reform.

On Saturday morning a 40-year-old woman was found unresponsive in her bed.

Her death follows the passing of Patricia Howell, aged 35, in Bandyup last month.

On Friday night, a 54-year-old non-Indigenous male prisoner died at Dowerin Work Camp.

Megan Krakouer of the National Suicide Prevention and Trauma Recovery Project told National Indigenous Times the deaths showed the clear need for action from both the WA and federal governments.

"In WA, prison health services must be removed from the Department of Corrective Services and placed under the Department of Health. Care in custody must be clinically led, independent, and equal to community standards," she said.

"At a Federal level, the Albanese Government must reform the Medicare exclusion under Section 19 of the Health Insurance Act 1973 (Cth).

"Rising deaths in custody show the current system is not delivering safe or consistent care. This outcome flies in the face of the Royal Commission into Aboriginal Deaths in Custody, which set out clear reforms that remain unimplemented."

Ms Krakouer said WA must also urgently integrate correctional intake systems with public health records so clinicians have immediate access to full medical histories and treatment needs.

"Both governments must stop procrastinating and act. Anything less leaves responsibility for continued preventable deaths at their feet," she said.

Last week, 34 Aboriginal community leaders, human rights experts, justice advocates and other notable Western Australians issued a call for urgent reforms in an open letter to the state's government on the anniversary of the Royal Commission into Aboriginal Deaths in Custody.

The signatories also called on WA Premier Roger Cook to meet with them.

On Monday, the Greens (WA) also renewed their call for the recommendations of the Royal Commission into Aboriginal Deaths in Custody to be prioritised ahead of this year's WA budget.

The Greens Justice spokesperson Dr Brad Pettitt MLC said after 35 years and more than 620 deaths across the country, it was time the recommendations of the Royal Commission into were made an urgent budget priority.

"I want to acknowledge the devastating loss of two more lives in WA's broken justice system this weekend, including the death of a second Aboriginal woman at Bandyup women's prison in five weeks, following the death of Patricia Howell last month," Dr Pettitt said.

"I extend my deepest respects and sympathies to the family and community at this time.

"While we don't yet know all the details, this tragic death is a reminder that our justice system does not always prioritise health when people are taken into custody or recognise the complex and intersecting health needs of women, particularly Aboriginal women."

Dr Pettitt said WA's prison healthcare system "rarely recognises any of these factors, including chronic illness, mental health conditions, disability, substance dependence, and intergenerational trauma caused by colonisation, child removal and systemic racism".

"As a result, Aboriginal women in Western Australia experience incarceration rates up to 23 times higher than non-Aboriginal women, making them amongst the most over-incarcerated group in the world," he said.

"Time and time again those in custody are being failed, often paying the price with their lives even though their deaths are both avoidable and preventable.

"It is time to end the use of imprisonment as a default response, implement the outstanding recommendations of the Royal Commission in full and invest in Aboriginal, community-controlled and culturally safe diversion programs."

National Indigenous Times contacted Western Australia's ministers for Corrective Services and Health for comment.