The three numbers for Health Link replace the 10-digit local numbers that were used in Calgary and Edmonton as well as the provincewide toll-free number.
The old numbers will continue to direct callers to Health Link for a time.
Alberta Health Services says the province's adoption of 811 will create consistency.
Several other provinces, including British Columbia and Saskatchewan, also use 811 for access to non-urgent health-care services.
People with a medical emergency should continue to dial 911 or visit a hospital emergency department.
Health Link was used by more than one million Albertans last year.
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