I can't speak as to what a med school will desire from you as a student; however, I do know that chemistry is a desired discipline for a career within the medical field. Each med school will have its individual preference as to who they decide to admit. Your MCAT score, what courses you've taken in high school through your senior year in college, your volunteer work, and experience in the fields of both your major as well as medicine often dictate acceptance. Med schools commonly desire experience in humanitarian action or a medical field before a student enters med school. Schools often look for diverse applicants who cooperate well with others and work diligently as an individual. They want to find those who will seek to further the medical profession by enriching the lives of patients and communities through medical practice. True doctors are brilliant in all walks of life, science, literature, humanities, and more.
To truly answer your question, yes the chemistry major would be beneficial in your application to med school, especially if you have an excellent understanding of biochemistry - as it is essential that doctors are able to understand how specific medications alter biological systems within the human body.
If you are seeking to apply to med school in the future, I would, as others have said, back your degree by experience. Many people major, but it is those who have done significant work in the process of obtaining such a major who stand out as applicants. I would also seek to volunteer in some area of medicine, perhaps as a laboratory tech, EMT, or assistant in a hospital. This will give you valuable experience on the path to a medical career and in life in general.
I hope I offered some logical insight!