CALGARY -- The Alberta government says more patients with cystic fibrosis will have coverage for a drug used to treat certain patients with the disorder.

Officials say coverage for Kalydeco, also known as Ivacaftor, began in 2014 for patients six years of age and older who have cystic fibrosis with one particular genetic mutation.

Starting March 1, the UCP government is expanding coverage of the drug for patients who have one of an additional eight genetic mutations:

G551D

G1244E

G1349D

G178R

G551S

S1251N

S1255P

S549N

S549R

Alberta Health Minister Tyler Shandro says the disease has a significant impact on people.

"We welcome this opportunity to provide Albertans with more treatment options and an improved quality of life," he said in a release Saturday. "As we recognize Rare Disease Day, it is a fitting time to acknowledge the importance of treatment to those with a rare disease with expanded support for Albertans affected by cystic fibrosis."

Groups pushing for further coverage of Kalydeco say they've been lobbying various provincial governments for years and are glad that action is now being taken.

"We applaud today’s announcement in Alberta. People living with cystic fibrosis in Canada need access to life-changing medications and Cystic Fibrosis Canada will continue to fight with our community for needed access," said Kelly Grover, CEO of Cystic Fibrosis Canada in a release.

Cystic fibrosis is a genetic disorder that affects the digestive system and the lungs and while the degree of its severity varies from person to person, officials say it is often fatal.

Patients who are 18 years old and older with an R117H mutation in the CFTR gene will also be provided coverage for the drug.