Cancer Focus NI's campaign is asking for equal access to 38 drugs not presently available in the region, but are available in England, Scotland, and shortly in Wales.
The charity is urging the Assembly to scrap the unfair 'exceptionality' clause, which it claims is designed to prevent 95% of cancer patients gaining access to new drugs and to put in place the funding needed to give equal access to cancer drugs without any further delay.
"These drugs are very expensive, so they've been turned down on economic grounds," Roisin Foster, Cancer Focus NI Chief Executive explained.
"In England, there's a safety net called the Cancer Drugs Fund that will allow patients to access those drugs.
"Now that is not a perfect model, and we're not particularly asking for exactly the same model, we're asking for the same access however that's delivered.
"Our patients are just as important if they live in Northern Ireland or if they live in Barking or Manchester."
The campaign aims to secure 10,000 pledges of support via email, letters and postcards which will be delivered to Health Minister Edwin Poots at Stormont this autumn.
Ms Foster added: "In Northern Ireland we do not have that safety net and we feel very passionately that people deserve the same quality of access and 14 other cancer charities in Northern Ireland believe that too."
Health is not a luxury, health is a right, so we should be providing the best possible care we can.
Professor Mark Lawler, QUB
Professor Mark Lawler from Queen's University's Centre for Cancer Research and Cell Biology said the motive behind the campaign is to provide the best care possible.
"Because we want to do that, it's important that we actually provide these drugs to cancer patients in Northern Ireland, it seems a very simple concept but that's really what we're asking for," he said.
"Some of these drugs, for example, have been the results of research that has been done in Northern Ireland.
"Not every drug can be used on every patient, that's not at all what this is about, but it's providing access to the best drugs that are tailored to individual patients, we sometimes call that personalised medicine, that's really what we want.
"If you look even in Northern Ireland itself, in the last 10 years, we have made some great progress in cancer care and treatment but it's to keep us at that level, because if you don't use the best of innovation to actually treat patients with cancer, then the danger is we'll slip back from the high standards that we have set ourselves over the last five years."
Alistair Murphy was diagnosed with aggressive prostate cancer in February 2008 and was given two to three years to live, news which he said was "absolutely devastating".
He is supporting the call for better access to treatment.
"It's an absolute disgrace because we're all UK tax payers and it's not fair that there's drugs that can extend your life or relieve your suffering, and if you live in Manchester or Luton, you can have them, but if you live in Belfast or Newtownards you can't," he said.
"They give you hope - I've survived a lot longer than would normally be the case, and I've managed to do that through clinical trials and through having a brilliant oncologist.
"These drugs don't just extend your life, they are like stepping stones that keep you going.
"These drugs don't extend life in agony, what they do is they take that pain away and they give [patients] a quality of life, even if they eventually do die from the disease."