Deaf and blind people face a situation that is "still grim", according to charities Action on Hearing Loss Cymru, RNIB Cymru and Sense Cymru.
New standards were introduced by the Welsh government over a year ago aimed at ensuring equal access to healthcare.
But the report says little progress has been made.
Richard Williams, director of Action on Hearing Loss Cymru said the charities that authored the report are "really concerned" that people are leaving surgeries and hospitals unclear about what doctors have told them, what medication they need or whether operations have been successful.
New standards were brought in after a BBC Wales investigation in 2013 found health boards were breaching equality laws by not providing accessible services for the deaf and hard of hearing.
But 91 per cent of people surveyed for the report said they were not aware of improvements in the way healthcare providers communicate and share information with them.
Kay Coleman from Swansea began losing her hearing 15 years ago and said she finds it "incredibly difficult" to book a doctor's appointment.
An estimated 500,000 people are affected by hearing loss and 100,000 are living with sight loss in Wales.
In a statement the Welsh government said it is "committed to ensuring the standards are fully implemented" and it is working with relevant bodies "to establish how best to capture and record communication preferences for those with sensory loss to ensure their needs are fully met in every healthcare setting".

England won the toss and chose to bat but went from 110-2 to 184 all out as they were dismissed in 40.2 overs.
Daniel Bell-Drummond top-scored with 51 but it was in vain as England went 3-0 down in the five-match series.
Sri Lanka A reached their target in 37 overs as Shehan Jayasuriya followed up his 5-35 with a knock of 83.

The attacker targeted a crowd that had gathered as the body of a prominent lawyer murdered earlier on Monday, Bilal Kasi, was being brought in.
Lawyers and journalists were among the dead. About 120 people were injured.
The Taliban faction, Jamaat-ul-Ahrar, said it was behind both the hospital attack and the killing of Mr Kasi.
He was head of the Balochistan province bar association. He was shot while on his way to the court complex in Quetta.
Jamaat-ul-Ahrar [The Party of Freedom Fighters] split from the Pakistani Taliban two years ago.
It has claimed a number of major attacks, including a suicide bombing that killed more than 70 people - including many children - at a park during Easter celebrations this year.
Balochistan, Pakistan's poorest province, has long been plagued by insurgency.
A number of people, including lawyers, have been murdered in Quetta in recent weeks.
Mr Kasi had strongly condemned those attacks. He had announced a two-day boycott of court sessions in protest at the killing of a colleague last week.
After the hospital blast, Pakistani Prime Minister Nawaz Sharif and chief of army staff Gen Raheel Sharif both went to Quetta for talks with security officials.
Mr Sharif expressed his "deep grief and anguish", adding: "No-one will be allowed to disturb the peace of the province. The people, policy and security forces in Balochistan have given sacrifices for the country."
The president of Pakistan's Supreme Court Bar Association, Syed Ali Zafa, called the assault "an attack on justice". The Pakistan Bar Council has announced a nationwide strike by lawyers on Tuesday.
Those killed in the hospital attack were said to include Baz Muhammad Kakar, a predecessor of Mr Kasi as provincial bar president, and more than 30 other lawyers.
Two journalists have also been identified among the dead - Shahzad Khan, a cameraman for Aaj TV, and Mehmood Khan, a cameraman for DawnNews.
Lawyers in Lahore staged a demonstration to condemn the attack. Some journalists also protested, demanding protection for freedom of expression.
The 600,000 people in Wales living with sensory loss are not having their basic healthcare needs met, according to a new report.
[NEXT_CONCEPT]
England Lions have lost their one-day series against Sri Lanka A after being beaten by four wickets in the third ODI in Kurunegala.
[NEXT_CONCEPT]
A faction of the Pakistani Taliban has said it carried out a suicide bombing that killed at least 70 people at a hospital in the city of Quetta.