Melissa Rivers wants answers about Joan Rivers' death.

The TV producer, who is preparing to file a multi-million dollar wrongful death lawsuit against the Yorkville Endoscopy Clinic in New York City, where her mother died from ''predictable'' surgical complications while undergoing a minor operation on her vocal cords last month, reportedly isn't looking for any financial gain from the court battle.

A source close Melissa, who inherited $100 million from the late comedienne, told E! News: ''It's not about the money. For Melissa, this is about getting an answer about why this happened and making sure it never happens again. The only way to get these answers is to file a lawsuit. Melissa wants answers - not money.''

The insider added: ''This shouldn't have happened. It was a completely treatable and avoidable complication.''

Melissa, 45, also sees the lawsuit as part of a large effort to change policy on a ''federal level'' with regard to how private clinics function and are regulated.

The New York City Medical Examiner's Office recently released a statement confirming that Joan's brain had been starved of oxygen after she suffered cardiac and respiratory arrest on the operating table, but her only child feels a lot of questions remain unanswered.

The source said she wants to know what decisions were made in the operating room, who made them and what precautions were taken when Joan arrived at the medical centre.