CVS Health announced Monday that it will begin vaccinating eligible populations this week at 10 pharmacies in Maine by appointment only.

Participating CVS pharmacies are in Augusta, Biddeford, Brunswick, Cape Elizabeth, Freeport, Kennebunk, Lewiston, Portland, Sanford, and Westbrook.

Appointments will become available for booking on Tuesday as stores receive shipments of vaccine, the national pharmacy chain said in a written statement. Vaccine is now available to all Mainers age 16 and older.

Patients must register in advance at CVS.com, through the CVS Pharmacy app or by calling CVS customer service at (800) 746-7287. Vaccinations will not be provided without an appointment.

“We’re proud to play a part in increasing access to the vaccine to as many people as possible to enable reopening efforts in the communities we serve,” said Neela Montgomery, CVS Pharmacy president. “Feedback on every aspect of the vaccination process has been incredibly positive, from the digital experience to interacting with our team of health care professionals whose incredible efforts are helping to move us one step closer towards a healthier post-COVID world.”

Depending on adequate supply, CVS Health plans to administer vaccines at over 6,000 CVS pharmacies across 49 states, Puerto Rico and Washington, D.C., which are within 5 miles of 70 percent of the U.S. population. CVS has the capacity to administer 25 million shots per month.

The pace of vaccinations is expected to accelerate as more supply becomes available through the Federal Retail Pharmacy Program and as the federal vaccine eligibility plan expands to include all U.S. adults beginning April 19.

The vaccine is available to all at no cost.