The man responsible for running the National Disability Insurance Scheme has acknowledged fear and concern surrounding proposed changes.
Martin Hoffman made the admission in a consultation paper about independent assessments and personalised budgets.
"I know the proposed NDIS reforms have caused real fear and concern in the community," the agency boss said.
"I deeply regret our genuine attempts to share information about the changes, and consult on them have not met expectations."
Mr Hoffman promised to be more transparent about the proposed reforms.
"By sharing more information, I hope we can create a greater understanding of the new approach and what it will mean for participants," he said.
Disability Minister Linda Reynolds put the proposed changes on hold after being appointed to the portfolio earlier this year.
"I'm committed to openness and transparency, to build trust within the community so participants can be reassured that some things won't change under this new proposal," she said.
Mr Hoffman confirmed the reforms, including independent assessments, would require legislative changes.
The agency is proposing to replace typical support packages, based on funding approved for participants with similar circumstances, to personalised budgets based on independent assessments.
People with disability and advocacy groups fear the independent assessments are a cynical cost-cutting exercise, shifting decisions on support packages from medical experts to anonymous bureaucrats.
The personalised budget model would estimate the funding a participant required based on two pieces of information collected through independent assessments.
The participant's functional capacity would be taken into account along with their responses to questions around support needs and personal circumstances.
They would then be measured against participants with similar conditions and circumstances to determine their funding.
The agency has developed 400 profiles to represent different groups of participants in the NDIS based on disability, age and functional capacity scores.
Greens senator Jordon Steele-John said the discussion paper confirmed many of the disability community's worst fears about proposed changes to the NDIS.
He said disabled people would have significantly less choice and control under the new funding model.
"This report is just pages and pages and pages of disrespectful, paternalistic and deceitful spin," Senator Steele-John said.
"Under this proposal participants will be matched to one of 400 different 'personas' that will determine a set amount of funding - a feature of the old pre-NDIS support system that disabled people campaigned so hard to abolish."
