Disability service providers are demanding urgent improvements to the National Disability Insurance Scheme (NDIS) as complaints mount about poor-quality plans.

More than 60,000 people are part of the scheme after rapid growth at the end of last year.

But with thousands of people rushed into the NDIS, many in the sector say speed is being prioritised over quality in the planning process.

In a major intervention, the peak body for Australia's disability service organisations is publicly calling for the planning process to be slowed.

"We don't want the pace of implementation to compromise the quality of the scheme, because I think ultimately that will undermine the credibility of the scheme," National Disability Services (NDS) chief executive Ken Baker said.

"It's very important that we get this scheme … back on track now so that it delivers its great promise."

The NDIS ran trial sites for three years until July 2016, signing up about 30,000 participants in that time.

It then moved from trials to a nationwide rollout but faced major difficulties after an IT meltdown.

Despite relatively few plans being approved immediately after last July's full scheme launch, NDIS participant numbers doubled in the six months to December 31.

Planners lack industry knowledge, miss 'essential supports'

NDS is today releasing a report titled "How to get the NDIS on track", which said ambitious implementation targets meant "rapid high-volume processing of participant plans".

"Some [plans] are excellent; others are poor and absorb substantial effort by participants, their families and providers to rectify," the report reads.

NDS said planners could not always see the existing services people received, meaning "essential supports" were sometimes missing from plans.

It said NDIS planning staff often lacked disability sector experience and knowledge.

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The NDS report makes 24 recommendations, including for disability service organisations to be involved in the planning process.

"Providers of specialist supports have deep knowledge of disability — and they know their clients," the report said.

It also demanded participants be able to comment on a draft plan before a final version was approved.

"Some participants receive plans they don't recognise," the paper said.

A spokesman for the Federal Government agency overseeing the scheme's rollout said it had scheduled a meeting with the peak body to discuss the concerns.

"The agency is committed to working with people with disability and providers to build and deliver this important reform," he said.

"We recognise that the NDIS represents a significant change for people with disability, their families and providers.

"We are currently reviewing provider and participant interaction with the NDIS with a view of improving their experience as the scheme grows."