Karl Stefanovic has been left outraged after the Medibank hackers published a new file related to female victims' most private medical procedures.

The health insurer confirmed about 9.7million current and former customers have been impacted by the data breach after a group of Russian hackers accessed Medibank's private system weeks ago.

The hackers have already stolen more than 500,000 health claims, along with personal information, and began sharing the private details on the dark web on Tuesday after Medibank refused to pay the ransom.

On Thursday, the hackers hit a new low when they added a post labelled 'abortions.csv.'

Daily Mail Australia understands the procedures in the file relate to any type of terminated pregnancy including non-viable pregnancies such as fetal anomaly, ectopic pregnancy, molar pregnancy, miscarriages and readmission for complications such as infection. 

Stefanovic said the latest leak was 'abhorrent' and that his heart went out to Australian women. 

'It involves some of these women's pregnancies and even alleged abortions,' he said on the Today Show on Thursday.

'That's how deep and awful this information is that they can release.

This is the type of information many women choose never to share with anyone, even their families, partners and friends.

'This could be your daughter, your mother, your wife, grandmother and it's out there.'

The hackers renewed their demands for a ransom from Medibank on Thursday, now asking for $US10million - the equivalent of more than $AUD15million.

In a brazen offer, the hackers also said Medibank could negotiate down to $US9.7million, amounting to $1 for every affected customer.

Those behind the breach revealed they would continue to publish sensitive details of customers' medical procedures to the dark web. 

'Society ask us about ransom, it's a 10 millions usd.

We can make discount 9.7m 1$=1 customer.'

Today Show tech expert Trevor Long said the hackers had been using 'codes' for the information they were releasing.

'I've seen codes for cocaine addiction, mental health disorders, there's a lot of medical information here that people might not have chosen to share with their closest family,' he said.

No credit card or banking details were accessed in the breach.

The health insurer has warned customers more of their data would be uploaded to the dark web after revealing earlier this week it had rejected hacker demands to pay the ransom.

Medibank CEO David Koczkar said the release of the stolen data was 'disgraceful'.  

'We take the responsibility to secure our customer data seriously and we again unreservedly apologise to our customers,' he said in a statement on Thursday.

'We remain committed to fully and transparently communicating with customers and we will be contacting customers whose data has been released on the dark web. 

'The weaponisation of people's private information in an effort to extort payment is malicious, and it is an attack on the most vulnerable members of our community.

'These are real people behind this data and the misuse of their data is deplorable and may discourage them from seeking medical care.' 

Australian Federal Police have ramped up efforts to catch those behind the huge data breach with the expansion of Operation Guardian, which was set up to tackle the recent Optus hack.

'Of course we are worried, https://www.radardakwah.com/ and that's why we have Operation Guardian in place working with state and territory police to identify members of the community who are at risk to identity fraud,' AFP Assistant Commissioner Cyber Command Justine Gough said.

'If members of the community feel they are at imminent risk they should contact triple zero immediately.'