Ms Bartter died after taking ecstasy at the Harbourlife dance music festival at Mrs Macquarie's Chair on November 8 last year.

Matthew Forti, 19, appeared in Downing Centre Local Court on Wednesday, where he pleaded not guilty to supplying ecstasy on that day.

He also pleaded not guilty to two other counts of supplying a prohibited drug on two days this year, and one charge of possession.

Mr Forti's solicitor requested a MERIT order, which would refer him to a drug treatment program.

Wearing a skinny black suit and dark sunglasses, Mr Forti did not comment as he left court.

Mr Forti allegedly supplied a number of pills to Ms Bartter's close friend Rebecca Hannibal, 19, of Cammeray, in the lead-up to the festival.

Ms Hannibal, a former Wenona student, is accused of then giving Ms Bartter the pills, and has pleaded not guilty to one count of drug supply.

At Ms Bartter's funeral last year, a 700-strong congregation was told that the risk she could die from the drug she took at the Sydney music festival was 1 in 10 million.

Hospital staff told her parents Kristy and Simon that there had only been a 0.00001 per cent chance their daughter could suffer an "acute, aggressive, irreversible allergic reaction".

The Bartter family wanted to make it clear that their daughter was not a risk-taker and explained how they spoke to her every day of the five weeks she had recently spent in Croatia, Greece and Spain with her high-school friends.

The business student was looking forward to moving to a city university campus with friends in 2015 and had made plans to spend Christmas with family in New York.

"Georgina had plans for a wonderful future," her mother said in the eulogy.

The Longueville teenager spent much of 2014 working with her father so she could afford to go travelling with friends.

"She has been and always will be his beautiful girl," Mrs Bartter said.

Mr Forti will appear in court again in May.

Georgina grew up in the Riverina.

She is the daughter of Simon and Kirsty Bartter.