Liberal doctors in portland metro area

My dad is 50 years old and has had diabetes for 33 years, he has many health complications due to it. We're going about the process to get a medical marijuana card because he more than qualifies. He has an appointment with his physician this week. My dad had previously brought up his interest in medical marijuana to his doctor before. His doctor mentioned his fear of signing the papers due to the fact that he works at kaiser. We're hopeing everything goes well at his doctors appointment and his doctor just signs the papers. However we still would like to have a back up plan. If anyone has gone through a similar experience and has any comments please reply or if anyone knows any more liberal doctors in or around the portland metro area email me at [email protected]