Complaints about the National Disability Insurance Scheme are up by close to 700 per cent in a year.

Reports to the Commonwealth Ombudsman jumped from 62 in 2015-16 to 429 last financial year, a sign of the NDIS' troubled nationwide rollout.

Complaints often focused on planning processes and what kinds of support people can access.

Participants are unhappy with NDIS planning staff, and the fact that meetings are often held over the phone.

“I didn't find it really respectful that people just phoned to go through what is essentially a really large life plan,” Ross Joyce from the Australian Federation of Disability Organisations told reporters.

“We were certainly not supportive of the approach that was taken,” he said.

People with neurological conditions and mental illnesses are some of the most heavily impacted by the lack of face-to-face meetings.

Disability organisations say developing NDIS plans over the phone often missed key aspects of the services and equipment needed.

“That has now changed … and we're very grateful that's been implemented and people with disabilities have been listened to,” Mr Joyce said.

Another central topic of complaints is the NDIS' online portals, as well as delays with quotes and payments.

The regulator received 188 grievances in the three months to June 30 this year — equal to the number of complaints received in the scheme’s first three years.

Urgent action from the NDIS was ordered for 44 of those cases.

Approximately 30,000 people signed up to the NDIS during its trial phase, with another 60,000 joining in the year to June 30.

The Ombudsman that deals with complaints had its funding boosted by $6.4 million in May's budget to deal with the rising number of complaints.