Nationally Accredited / Privately Owned & Operated. Keystone Pharmacy is an accredited USP 795 non-sterile pharmacy and also an accredited URAC Mail Pharmacy Service Provider. Keystone targets the highest ethical standards in business while pursuing health care solutions for patients suffering with many challenges including threatening infections. Keystone’s anti-infective program has one goal in mind: To heal, and not to refill™! At Keystone we take pride in clinical value, patient service and business ethics.