Yes, the noun physician is a common noun, a Word for any physician of any kind.
A proper noun is the name of a specific person, place, thing, or a title; for example:
- Daniel Carleton Gajdusek, physician, researcher, and co-recipient of 1976 Nobel Prize in Medicine
- Physicians Drive, Wilmington, NC or Physicians Drive, Jackson, TN
- Physician Now Urgent Care, Shawnee, KS
- "The Physician" by Noah Gordon
- "The Physician" movie based on the novel to be released in 2013
