I have persistent pain in my left foot. After four years and four podiatrists the pain hasn't gone away. What's my next choice?

See below. Ask for a referral to a pain managment specialist or neurologist.
Diagnosis? What was the diagnosis given to you? Was it the same for all 4 docs or was it different? What treatmetns did they offer?
Nueropathy? Though I am sure you were checked for gout for this complaint, you may have neuropathy which can be caused by many things including diabetes. You may need a neurologist to eliminate this as a cause.