Is Centers for Spiritual Living associated with Christian Science?

No. Centers for Spiritual Living are a unique and separate entity from Christian Science.  Ernest Holmes, the founder of Centers for Spiritual Living, studied with many of the spiritual leaders of his time, including Mary Baker Eddy, the founder of Christian Science, but he was not a member of that group.  In the Science of Mind, we believe that healing comes in many forms.  God is expressed through doctors and medicine just as God is expressed through everyone and everything in the physical universe.