Parkinson's Ireland has warned that its services are at risk due to the low level of State funding.
The support charity currently receives €70,000 a year but said this amounts to just 10% of its overall income when on average other neurological charities receive over 50% of their income from the Government.
The charity's Chief Executive, Shane O'Brien, said it applied to the HSE for an extra €121,000 under Section 39 funding and that without this services are at risk of being cut.
The charity said it is facing a deficit each year of €160,000 to continue to operate a free Parkinson's disease support line, staffed by two nurse specialists and a part-time dietitian.
Around 15,000 people have Parkinson's disease and it is the fastest-growing neurological condition.
The numbers are set to double by 2040, due to increased life expectancy.
Parkinson's disease is a progressive neurological condition and there is currently no cure.
Parkinson's Ireland provides a range of services for people living with the disease, their families and care partners.
It said the €70,000 a year current funding is ringfenced for services in Galway and Mayo for physiotherapy and speech therapy.
The organisation said it has also lobbied Minister for Disability Roderic O'Gorman, Minister of State for Disability Anne Rabbitte and Minister for Health Stephen Donnelly on the funding issue.
The HSE said that it funds a range of community services and supports for people with Parkinson's, including through acute and primary care.
It said it has received a number of business cases from Parkinson's Ireland.
The HSE said that funding requests will need to be considered in the context of the overall neuro-rehabilitation strategy.
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Consultant Geriatrician Professor Suzanne Timmons said patients are facing long waits for diagnosis and there are too few specialist clinics in the country.
Speaking on RTÉ's Morning Ireland, Prof Timmons, who runs one of 14 Parkinson's centres in the country, said the public health system is failing Parkinson's patients.
"Half as the Parkinson's clinics are in Dublin. We have none at all in the midlands. We have none in the northeast. We have one in the northwest. And also the people in the Dublin Parkinson's clinics, almost all of those have a Parkinson's nurse attached to them, whereas they're very rare anywhere outside of Dublin, " she said.
Professor Timmons said that some patients are forced to travel up to 300km to attend a clinic and have to pay privately to stay in a hotel overnight.
She said a separate survey of 1,400 patients living with Parkinson's found that 60% percent of them had to be diagnosed privately, otherwise they could have been forced to wait up to two years for a diagnosis.
