The NACVS has warned that the newly established NHS bodies set up to build relations between the health and voluntary sectors might overlook small and grassroots organisations.
Neither the National Strategic Partnership nor the Third Sector Commissioning Task Force have any members representing Councils for Voluntary Service.
"It defies belief that there is no place on the task force for an organisation with a local focus," said Dianne Leyland, director of development at the NACVS. "There is an unfortunate emphasis on the national or bigger players."
She said that without a voice on the task force, the role of smaller local groups will be ignored.
"It seems that the NHS thinks of the voluntary sector only in terms of hospices or large organisations delivering meals on wheels," Leyland added.
"We recently bid for funding to support a worker who will help raise the profile of the work done by smaller organisations and share good practice among them, but it was knocked back."