Occupational Medicine Occupational Medicine 10201 SE Main St., Suite 29 Portland, Oregon 97216 For Appointments call 503-251-6363 Hours 8 a.m. to 5 p.m., Monday-Thursday 8 a.m. to 4 p.m., Friday Specialty Occupational Medicine Physicians Bruce A. Free, DO David E. Z. Hall, MD Nurse Practitioner Karen A. Zwickert, ANP View Larger Map Health Plans Accepted Most major health plans are accepted. Please call to verify if a particular insurance plan is accepted.