Former lord mayor Robert Doyle has been asked to attend an interview in the next 10 days to answer allegations he sexual harassed a woman when he was the chairman of Melbourne Health.

The Department of Health and Human Services said it had asked Mr Doyle to attend the interview, or undertake an independent medical evaluation to assess his ability to answer the claims.

The harassment allegations prompted Victoria's Health Minister, Jill Hennessy, to order an investigation by Charles Scerri QC, who did not reach any final conclusions because Mr Doyle was too ill to respond to the claims.

In a report released last month, Mr Scerri said there was no reason to doubt the claims made by the woman, known as Carla, who alleged Mr Doyle groped her at a black tie event in 2016 while her then-fiance and his daughter sat metres away.

Mr Doyle was attending the dinner in his capacity as the then-chairman of Melbourne Health.

The Department said it had written to Mr Doyle on six occasions but was told each time the former lord mayor was "unable to participate".

"Only yesterday, a further response was received from Mr Doyle's lawyers saying that he remains unable to participate on medical advice and this is likely to be the case for the foreseeable future," a department spokesman said.

The department's request comes as Carla, who does not want her surname made public, claimed two senior Melbourne Health executives told her husband it would be in her interests to remain silent.

Carla also said she would "definitely not" report harassment again after enduring the "humiliating" investigation process for no outcome.

Sorry, this audio has expired Carla speaks to ABC Radio Melbourne's Jon Faine

Interviewed with her husband Mark, a Melbourne Health employee, on ABC Radio Melbourne on Thursday, Carla said she felt "gutted".

"I feel foolish… because I believed in the process," she said.

"I was told that there would be an outcome, that whilst Robert Doyle wasn't compelled to respond, that basically Charles Scerri would make a call."

'She feels as powerless as she did on the night'

Carla was critical of Melbourne Health's handling of her complaint, claiming executives had tried to discourage her from pursuing it.

"I can tell you that both Christine Kilpatrick, the CEO of Melbourne Health, and Ruth Vine [the executive director of NorthWestern Mental Health], individually, to Mark, said that it would be in my interests, for my career, for the family's sake to remain silent," she said.

"I think across all industries, if you're in a position of power or management … if you've got an employee coming to you, saying that my wife was touched, in an inappropriate way, I think there is, regardless of industry, a response.

"Or, 'I'm not sure what the avenue is to take this, but I will take it somewhere'.

"There was nothing like that."

The ABC sought a response from Professor Kilpatrick and Dr Vine. Both declined to comment.

Mr Scerri concluded that "in all the circumstances, Melbourne Health did respond to the complaint appropriately".

Carla's husband Mark said his wife felt "invalidated" by the investigation process.

"She feels as powerless as she did on that night," he said.

"She's wondering, 'Why did I do this, why did I come forward, why would anyone come forward?'

Asked if she would report harassment again, Carla said: "No. Definitely not. This has been humiliating. I'm really insulted."

Robert Doyle remains 'very unwell'

Carla said she was disappointed that Mr Scerri had not made findings on her allegations because Mr Doyle said he was too ill to take part in the investigation.

"If I ever do the wrong thing I'm going to call myself mentally unwell," she said.

Carla said as the wife of a psychiatrist, she understood that mental illness required treatment.

"I want to make people aware that I didn't place any pressure for this report to be concluded.

"Charles Scerri said that he would make a call, that [following] an appropriate period of time, should Robert Doyle choose not to respond, he would make a call on the findings of this investigation. That hasn't happened."

Mr Doyle spent time receiving treatment in hospital earlier this year but has recently been spotted at an Albert Park cafe.

A spokeswoman for Mr Doyle said he remained "very unwell".

Melbourne Health declined to comment on Carla's comments, and referred the ABC to an April 24 statement, in which it said it was "united against sexual harassment, assault or discrimination of any sort".

The statement said Melbourne Health encouraged any staff, volunteer or board member who had experienced or witnessed misconduct to report it, adding that it had strengthened its complaints handling processes following an internal review.

In March, a separate investigation into allegations by a Melbourne councillor and a former councillor of alleged sexual misconduct by Mr Doyle made four adverse findings against the former lord mayor.

The investigation, by Ian Freckelton QC, found Mr Doyle's behaviour towards councillor Cathy Oke and former councillor Tessa Sullivan could constitute sexual harassment and gross misconduct.